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A highway construction worker in rural Pennsylvania goes missing when he is mysteriously drawn into an underground tunnel filled with human remains. Meanwhile, back in the lab, Walter is attempting to simulate travel between realities on frogs. When itÂ’s discovered that the disappearance in Pennsylvania is not an isolated incident, the Fringe team travels to the crime scene to dig up evidence.
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Peter, Walter, Olivia and Broyles pursue a strange and deadly occurrence in Philadelphia where a bomb blew up inside a train station but left no trace of any explosive device. The perplexing and unexplained set of circumstances returns Walter to the lab to closely examine the human remains where he uncovers an unlikely energy source that triggered the explosion. With the explosive threat of more bombs and links to a classified military project, the intense investigation leads Olivia and Peter to Iraq.
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Recuperating from the traumatic and alarming meeting with Massive Dynamic founder William Bell, Agent Dunham consumes a powerful “fringe” concoction that Dr. Bishop prescribes to stimulate her memory. Meanwhile, the Fringe Division investigates a series of robbery cases that are tied to shape-shifting. As clues are tracked and memories are jogged, another woman experimented on by Dr. Bishop is introduced and a flashback reveals more about Olivia’s visit to the alternate reality.
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The Fringe team travels cross-country to Seattle after learning of a mysterious incident involving a man who attacked his boss because he believed he was an evil ram-horned creature. As these puzzling occurrences continue, the team tirelessly explores strange and creepy links to dreams. In pursuit of additional information, Agent Broyles has a disconcerting meeting with enigmatic Massive Dynamic executive Nina Sharp that leads the investigation in an unthinkable direction.
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When a kidnapping rapidly escalates into a hostage situation in New York, local authorities close in on the suspects only to discover a mysterious force with mind-blowing consequences. As the investigation intensifies, the mystery and threat deepen to unimaginable proportions when the Fringe Division connects a link between the kidnapping and Massive Dynamic.
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When a peculiar abduction occurs in Boston, the Fringe team uncovers details of the mysterious man known as The Observer. While the bizarre case takes center stage, Walter, Peter and Astrid hit the lab to analyze unusual evidence and deal with Walter?’s insatiable appetite for a milkshake.
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After a cargo ship runs aground, the shoreline becomes littered with bodies hosting a giant squid-like creature. The Fringe team descends upon the scene to examine the bodies and discovers that the mysterious organisms are actually giant parasites. As the investigation unfolds, Walter heads back to the lab while Olivia, Peter and Broyles race against time when they realize the case has ties to a threatening organization.
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A Fringe investigation is triggered when a patient at a mental institution undergoes an impromptu brain surgery that unexpectedly leaves his brain exposed. Despite the unthinkable circumstances, the patient?’s condition and sanity miraculously improves before the Fringe team arrives. While Agent Dunham and Peter scan surveillance tapes (and Walter enjoys his pudding), Olivia recognizes a familiar face as Thomas Jerome Newton, the leader of the ?“shape-shifters.?” As similar cases stack up, the Fringe team heads back to the lab to determine exactly how patients are being cured. Walter?’s brains are put to the test and William Bell resurfaces.
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After a teenage girl is pronounced brain dead, her mother takes her off life support, but when doctors operate quickly to remove her organs, the deceased girl shockingly awakens screaming an alphanumeric code. Equally as perplexing as her resurrection is that she is now somehow able to speak Russian and possesses classified information only a high-ranking soldier would know. While the girlÂ’s mind-bending condition intensifies, Walter dusts off some old lab videos and hypothesizes the unthinkable, sending Olivia and Peter to investigate the bewildering case. And hereÂ’s another mystery: is it an unaired episode from Season One, or is it from an alternate universe?
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Following an unexplained attack involving disfigured humans, the Fringe team visits Edina City, a small town in upstate New York, to uncover leads surrounding the bizarre case. When itÂ’s determined that these disfigured people have managed to hide themselves for a while and theyÂ’ll do just about anything to keep it that way, the investigation takes an unexpected turn.
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When a man enters an office in Boston for a meeting, he becomes disoriented and collapses, only to have his veins erupt and spray blood everywhere. Shortly after Olivia and Peter arrive at the scene to investigate the bizarre case, it's discovered that a lethal virus - with deep ties to something very valuable - is spreading, so the CDC moves in to quarantine the building and eradicate the pathogens. Isolated inside with the rest of the exposed office employees, Peter and Olivia face life-threatening circumstances, sending Walter, Broyles and Astrid on a frantic search for a solution to save them.
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When a specific group of guests at a wedding in Brookline, MA, suffocate from the inside out, the upsetting and disconcerting crime scene has the Fringe team investigating how the toxin was delivered and targeted. As evidence is taken into the lab, it's discovered that the wedding ceremony was a testing ground for a weaponized science experiment. Adding to the intense lab investigation, Walter uncovers an alarming formula that reveals a link to a branch on the Bishop family tree. With the escalating threat of more deadly attacks and unexpected familial ties to the case, the Fringe team stops at nothing to prevent further catastrophic events.
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After a violent tremor shakes a Manhattan office building to its core, leaving only one survivor who leads the Fringe Team to believe he is not from this reality. Walter surmises that what shook the building was not geologic, but rather something discovered by him and William Bell many years ago. With another catastrophe imminent, the team races to Jacksonville, the site of Walter and William's experiments, forcing Olivia to face her mysterious past in an effort to save hundreds of people from certain death.
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When a perfectly healthy woman is found dead from a disease she never had, the Fringe team investigates the origin of this inexplicably fatal condition before it claims more innocent victims. Meanwhile, Olivia struggles to keep WalterÂ’s secret from Peter, and her loyalty to Peter is tested as time goes on.
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When passengers aboard a commuter train appear to have died a still death, it seems that a switch was flipped because all cell phones, mp3 players, laptops, batteries and bodies have been drained of power. As the Fringe team assembles at the bizarre crime scene, Peter remains suspicious that something is amiss with Walter, who is struggling to keep the unimaginable a secret. When the investigation leads them to Alistair Peck, a very powerful man who has tremendous energy with severe consequences, an ironic set of circumstances surface
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When two teenagers on a date turn up “dead” at an abandoned warehouse with the three puncture wounds to the soft palate – a trademark of the shape-shifters – the Fringe team investigates the evidence as well as the motives of mastermind Newton. Upon discovering a shape-shifting embryo, Walter returns to the lab to conduct further analysis, and Olivia and Peter head to Massive Dynamic for answers. Meanwhile, Peter reveals a family secret to Olivia as Walter struggles to recall what Newton knows about “building a door.”
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While Walter deals with some very upsetting news, he tells OliviaÂ’s niece, Ella, a fairy tale that includes musical performances by Olivia and Agent Broyles.
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Peter teams up with a local law enforcement official, Sheriff Mathis, on a serial murder investigation with ties to Newton. Meanwhile, Walter copes with the possibility of being sent back to St. Claire’s, and someone from the “other side” pays a visit .
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Sacrifices will be made and both universes may never be the same again after Walter and Olivia visit the “other side.”
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After the extraordinary turn of events that shockingly left an imprisoned Olivia "over there," she fights to find her way home. Meanwhile, Peter and Walter try to move on with their lives unknowingly alongside alternate Olivia.
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The story alternates to the Fringe Team "over here" where they investigate a mystifying case that people are discovered in a trance-like state that ultimately leads to their death. The unlikely suspect: a mysterious box. As Peter and Walter collaborate to study its properties, alternate Olivia presses on and turns up the heat on an unsuspecting Peter. Meanwhile, key information about the future is revealed when Walter and Nina meet at Massive Dynamic for the emotional reading of the last will and testament of William Bell.
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In this case, timing is everything as a series of anomalous events lead the Fringe Division to investigate deadly incidents with unimaginable coincidences. As the freaky crimes continue to occur, the team is in a race against time to protect potential victims. Meanwhile, Secretary Bishop shares his strategic plan with Colonel Broyles as Olivia grapples with a heart-stopping vision.
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Newton, concerned about the consequences of a distressing development involving a high-ranking official, is forced to call to action a sleeping shapeshifter. As Walter and the rest of the team gather evidence, they move the investigation to Massive Dynamic, where Olivia goes on high alert and Walter finds himself in a perilous situation.
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The alternate universe Fringe Division investigates a shocking breach of security when a twin frees his brother from a quarantined Amber area. As the team sets out to crack this sophisticated case, Walternate experiments over there more with Olivia as she reenters the tank. Meanwhile, visions of Peter continue to haunt Olivia about returning to the "other side."
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Back "over here," the Fringe Division investigates a bizarre phenomenon when 15 people up and down the Eastern Seaboard, all suffer retrograde amnesia from listening to their shortwave radios on the same frequency. Much to Walter's dismay, Peter presses on with piecing together the mass destruction device. Just as alternate Olivia and Peter's chemistry deepens, the anticipation of Olivia's return escalates.
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When a serial kidnapper "over there" strikes again, the emotional and familiar case hits home for Colonel Broyles, sending a determined Olivia to uncover additional details about the abductions. In the meantime, Olivia fights on and reunites with Henry to enlist his services on an intense and covert mission to return home.
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Peter grapples with the aftermath of recent events as Olivia desperately searches for an ally. Meanwhile, the Fringe Team discovers a critical device that communicates between universes.
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When the Fringe Team investigates a case where a victim had his heart extracted, it's just the beginning of a series of mysterious and reanimating events tied together. Meanwhile, Peter comes to terms with the reality of his relationship with Olivia.
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An Observer makes contact with the Fringe Team to help rectify a mistake. Meanwhile, Walter befriends Roscoe Joyce, keyboardist for Walter's favorite 1970s band, "Violet Sedan Chair." Walter will learn the real reason the band broke up, and realize that the lives of these two men, who have never met before, overlap in strange and unexpected ways.
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When the Fringe Team visits Massive Dynamic's assembly of doomsday device, Walter becomes greatly concerned for Peter's well-being, so he turns to Nina for added brain power to understand the relationship between Peter and the super-weapon. Meanwhile, the discovery of a dead body triggers an intense investigation.
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When a scientist falls dead after ingesting a lethal cloud of blue powder and his bones disintegrate in his body, the CDC suspects a biological attack. As the Fringe Team investigates further, a subject from Walter's past with ties to Olivia reluctantly agrees to assist with the intense case.
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As the story shifts back to life "over there," the absence of Colonel Broyles shifts the dynamic of the Fringe Team as they investigate a bioterrorist armed with an insect that has a taste for human flesh. Meanwhile, alternate Olivia is reunited with her beau, and Walternate remains determined to save his world but discovers there are certain lines he will not cross.
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A series of Fringe events leads the team to the home of a woman grieving over the death of her husband, while Peter and Olivia make an effort to repair the emotional rift between them.
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Walter lords over his Massive Dynamic kingdom in the security booth, doing bong hits with the watchman -- HURLEY! Sorry, "Kevin" (Jorge Garcia).They watch the security monitors, tripped out. Walter notices a room no one goes into. William Bell's office.Cut to Walter bringing William's old research files to Nina.He mentions that Peter and Olivia are a couple now. Walter is freaked out by his failure to save the universe on his own. He wishes he still had William.Massachusetts Metal Depository Two figures in black scale the outside of the building. At the top, they strap on boots and somehow walk upside-down on the ceiling. A security guard intercepts them. And then the camera turns upside down and we see that the guard was on the ground and the people were climbing DOWN and strapped on boots to keep them on the ground. The security guard shoots one of the men. His blood floats up into the air and his body floats away.Harvard Engineering Building Peter runs trials on the shape shifters' memory cartridges. He's linked them and found a bunch of data, but has no idea how to read it. Olivia calls. He contemplates before answering. He lies and tells her he's at the gym.Broyles texts Olivia to the floating guy crime scene.Once there, Walter marvels at the guy's floating body, hovering like a helium balloon. The other one got away. The guard provides a sketch of him. He says no precious metals were taken.They found a key card on the dead guy, but not to the metal building.They check out his body and find his legs are atrophied but his chest and shoulders aren't. Olivia reports that Osmium was stolen. It's used in electrical contacts and fountain pen nibs. Peter says it's rare but not valuable. Walter says it's the heaviest element on earth.Dr. Crick (Alan Ruck) leaves his office and finds the other thief waiting for him in the parking lot. He tells Crick the other guy is dead. He says he's nauseous and has a terrible headache. Crick tells him to meet him at the lab. The man is wearing weighted shoes to hold him down.Peter looks through William's notes for research on gravity. Walter finds no helium or anything gaseous in the thief's blood. His white blood cell count is low. He's floating less.Olivia and Peter head to the warehouse the keycard was traced to.Meanwhile, Click uses his keycard to enter a warehouse. The man is waiting for him. He's bleeding from his eyes.The doctor explains his participation in the experiment will help him find a way to eliminate the side effects. The man dies.Back at the lab, the floating man crashes to the ground. Walter and Astrid try to move him but his body weighs a ton. Walter wants to test for osmium. But he doesn't see how it would make the man float.On the drive to the warehouse, Olivia is completely honest with Peter and says she hates his back rubs. She says trust is great when it goes both ways. Peter doesn't mention his secret research.At the warehouse, Crick amputates the other dead floating man's foot. He takes bone scrapings. He sees Peter and Olivia coming on security cameras.They get inside and find not just the thief, but another body cut up and even more in the freezer. They all had high levels of osmium in their blood. They were injected. Walter's still stumped over how it worked.Broyles finds piles of wheelchairs out back. The men had Muscular Dystrophy and had been confined to wheelchairs for years.Crick watches a game of wheelchair murderball. His son is one of the players. He strikes up a conversation with a young man in a chair in the stands. He says he can give him a miracle.In the lab, Walter examines the osmium from the dead men's blood. Peter and Olivia look over the victim's files. Peter suggests a pizza run. They're holding hands in the hall when they run into Nina. She has a file for Peter. He casually mentions he's doing research on shape shifters.Astrid brings Walter mints. He's stumped over how someone defied physics by making the heaviest element lighter than air. He drops a mint in a 2 liter of soda and it sprays everywhere. Nina comes in and Walter whimpers about needing William's help.He found research on "soul magnets" in William's stuff -- his theory that people live on, their consciousness just needs a vessel. He suggested implanting magnets in someone to tie them to the vessel before they die. Walter wonders if William did it and they just have to find the vessel.He's despondent. Nina assures him he won't fail. "Because you can't," she says.In a basement, the doctor injects the young man Vince with something. Almost immediately, the man rises to his feet. He takes a few steps then floats off the ground. The doctor hands him weighted shoes and tells him to wear them outside. Then he says he doesn't have enough material for another treatment. Vince asks how they get more.In the lab, Walter tries melting the osmium from the blood with liquid nitrogen. He finds it reacts oddly and concludes it was mixed with another element.The doctor puts his son Michael into bed and says he has to get back to work at his office. He says he has a new project that's keeping him busy. He tells his son he's close to something big -- a breakthrough that'll change everything.Walter tells Peter about the osmium being mixed with another element found in meteorites. The Museum of Science has meteorites.Cut to Vince dressed all in black about to break into the Museum of Science. He floats down to the meteorite.Olivia, Broyles and Peter show up outside. They see the weighted shoes and a rope outside.Vince lets Crick in from outside. He scans some meteorite samples, but they notice everyone coming.Crick runs. Vince is left floating helplessly. He cuts his tether and floats up into the high ceiling. He grabs onto a suspended astronaut display but starts to slip. Olivia catches up with Crick.Peter leaps onto Vince before he can float away and they gently come to the ground.Peter brings Crick's son into visit him in lock-up. He tells his son he hurt some people while he was trying to help them. He says he was going to fix them. He says he did it for his son. His son asks if his dad thinks he needs to be fixed. He says he was happy.Walter asks Crick how he defied the laws of physics. Crick says he works in aeronautics and was hired to create a new alloy for military aircraft, dense enough to keep pilots safe from ground fire but still allow for flight. He combined two elements and, somehow the result was lighter than air. He says it was an accident.Walter visits Nina. He says Crick is in custody but he's not responsible. Walter is. He says Crick didn't change the laws of physics, it was already happening because of what Walter did 25 years ago. He thinks he's figured out how to stop it.Peter asks Olivia to meet him at the engineering building. He tells her that because he's at the center of whatever is happening with the two universes, he's been working on something, but hasn't told anyone. He doesn't want there to be any more secrets between the two of them.Walter brings up soul magnets again to Nina. They notice the brass bell that William left to Nina. He thinks the harmonic vibrations from the bell will bring the energy from William's soul. He rings it. Nothing happens. Walter says he thinks William will find them.Peter shows Olivia his research on the machine. When she sees the shape shifter memory drives she realizes he must have been the one killing to get them.He starts to explain more what he's doing when suddenly Olivia spaces out. Then she tells Peter the decoder for the memory drives is in her office -- the one at Massive Dynamic."Hello, Peter, it's nice to see you again," she says.
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When the Fringe team investigates an apparent suicide victim, they uncover a second set of fingerprints leading them to a woman with uncanny characteristics that cannot die.
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Future Agent Bishop is wheeled into the ER by Astrid and Fringe Division. He's bleeding by they tend to him. Fringe Medical, New York, May 20, 2026A girl comes to visit Peter in the hospital -- she's young Agent Dunham, Olivia's niece Ella. Olivia explains they think it's the End of Days. Peter hugs Olivia hello. He wants to track Moreau.Ella asks him if he remembers what he was saying when he was in the field, about the machine and being from the past. They look at the TV, there's a stage three tear at One World Trade Center.The terrorist Moreau is claiming responsibility. We see his picture, then we see him with two men inside the Brooklyn Philharmonic. He listens at the door then places a canister and his henchman shoots the guard. They set up other canisters. They detonate, leaving nothing but ashes.Future Peter, Olivia and Ella check it out. There are bodies sheared in half and rubble. Astrid reports the alarm was disabled. One canister remains -- a dud. Peter is excited to examine it.Fringe HQ, BostonPeter examines the canister with Astrid, he tells Olivia it doesn't seem like it should be working. He says there's only one person who can understand it. Walter. He says it's past time to call in markers to see him.Peter visits Walter in jail. Walter is brought out, he's aged and bedraggled, like when we first met him in the metal hospital."It must be bad if they're letting you see me," Walter says. Peter says it is. A wormhole opened in Central Park, but they ambered it over. There are tons of gamma rays. The wormhole was to 250,000,000 years ago.Peter shows Walter why he's come. He explains the canister is a light bomb used by the End of Dayers to try to rip holes in the fabric of the universe at the soft spots, to accelerate the End of Days. Peter wants to trace the parts.Walter says he'd need his tools to help, but they both know that won't happen.Peter waits to see Senator Broyles, who now has one milky eye. There's a report on TV about a vortex opening in the Thames.Peter shows Broyles the light bomb and asks for a temporary furlough for Walter. Broyles says there's no way, because Walter is responsible for everything, even if it wasn't his intention."If what we lost in Detroit still means anything to you, just give me one chance. It's all I'm asking," Peter says.Peter brings Walter back to his lab at Harvard, which has been cleared out and taken to evidence. Olivia's getting it back.Walter is shaved and cleaned up, and we can see half of his body is now partialy paralyzed. Olivia comes to see him. He congratulates her very belatedly on her wedding.A mover starts to drop one of Walter's boxes and as he's yelling at him, it suddenly stops in mid-air and floats gently and safely to the ground.Olivia explains that she learned to control her powers a few years ago.Moreau meets with a man on a park bench late at night. Moreau mentions the man's world was destroyed by a wormhole.Moreau explains the light bomb has twice the yield of the device they used last night, and he followed his specifications. It's Walternate, and he says soon our world will join his.Harvard Peter visits Walter and brings him red vines. Walter can't make any sense of the technology. He says they can't stop their destiny, which they triggered when they used the machine. He didn't understand the worlds were inextricably linked and without one the other can't exist."When their world was destroyed, that was the day we sealed our fate. For all intents and purposes, that was the day we died," Walter says.Walter asks if Peter has seen Walternate. Peter says he's become a recluse. Walternate came over to save his world and got stuck when his was destroyed.Walter blames his hubris for what happened, but Peter reminds him he was the one who got in the machine. Walter thanks him for speaking at his trial, but calls himself " the most reviled man in the universe."At home at night, Peter makes Olivia dinner. There's kid's art on the fridge -- from a neighbor girl. They talk about kids. He asks if she wants to reconsider. He thinks they can still have a bunch of kids, even with how the world is.The next morning, Walter calls Peter excitedly -- he's figured out they're splitting atoms. He knows a way to track it using the radioactive signature.Peter and Olivia head out to campground where the signature was detected. An agent brings Peter a small piece of metal but instead of showing it to Olivia he looks at it alone -- it's a key box with a key inside.Moreau and his goons bring canisters to the amber in Central Park.At Fringe Division an alarm goes off for Central Park.At the lab, Walter explains the light bomb technology to Olivia and her niece. She gets the call about the security breach at the worm hole.Reiden Lake Peter arrives at his family's old summer house. His phone rings but the call drops. He uses the key and goes inside, gun drawn.He finds Walternate calmly waiting for him. Peter puts down his gun and sits. Walternate says he couldn't just call. Peter thinks letting him know Moreau works for him was a way to get his attention. Peter figures out Walternate designed the light bomb.Walternate is bitter and angry, saying he came on a mission of mercy. He blames Peter for using the machine, but Peter reminds Walternate that he started the machine on his side first."You destroyed my universe son, now I'm going to destroy yours -- but not all at once," Walternate tells him.At the wormhole, Olivia reports to the scene. She's giving orders when there's a giant flash of light. She comes to in time to see a vortex forming in front of her.Back at the lake house, Peter apologizes to Walterate "for destroying your people -- our people." He says if he could take back that choice, he would, but it's no excuse for what Walternate is doing.Peter takes out handcuffs and says Walternate has to come with him.Walternate says if he was really there he might kill Peter, so it's good he's not. Peter realizes he's talking to a hologram. Walterate says he going to start by killing someone Peter loves, then he ends the transmission.Cut back to Olivia giving orders at the wormhole, reaching into her car for her phone and turning around to see Walternate standing in front of her. He raises his gun and shoots her dead between the eyes.Later, Peter speaks at a night time beach funeral service for Olivia. Nina Sharp, Broyles and her niece are there, as is Walter, in prison garb.They send her casket out to sea on a pyre.In the car after, young Agent Dunham tells Walter they're still trying to seal up the wormhole. Walter gets an idea and asks to be taken t his lab.Peter drinks alone in his house. He cries over the drawing of he and Olivia.The next morning, Walter is done with his diagnostic. He tells Ella he can't understand her loss and would change things if he could.On his computer, Walter sees a simulation of a wormhole and thinks he has the answer.He arrives on Peter's doorstep with calculations. "Peter I was wrong, it's not too late -- we can save both worlds," he explains. Walter says they can make a different choice. He shows Peter the old machine drawings.Walter says it always bothered him not being able to figure out how the parts ended up millions of years ago. He realizes he sent the machine back through the wormhole.He can't undo that because it's already been done, but now he can find a way to bring Peter's consciousness forward so he can witness what happens if he gets in the machine.Back with Peter in the machine. He's been in it for 60 second and Broyles, Olivia and Walter wonder what to do.On the other side, Brandon show Walternate the machine turned itself on and the soft spots are getting worse. He asks for Olivia. He thinks she can turn it off.She realizes the other side put Peter in their machine and now they're the ones who are going to get destroyed.On our side, they race to get Peter out. Suddenly it slows down and Peter snaps out of it. He looks at Olivia and says "Olivia, you're alive."Then he closes his eyes and does something and the two sides are face to face in the same room, Fauxlivia to real, Walternate to Walter. Peter gets out of the machine and tells Olivia he understands now.Peter tells Walter they're the First People's and they sent the machine back.He tells Walter and Walternate that the worlds are linked and you can't destroy one without harming the other. So he tore holes in both universes and they lead to this room, a bridge so they can work together.Suddenly, as he's talking, he disappears, leaving Walternate to scowl at Walter that it's his fault. Olivia suggests the damage is done, "so maybe it's time we start to fix it."Outside the Statue of Liberty, a group of Observers stands staring. One Observer tells the other: "You were right, they don't remember Peter." The other replies: "How could he? He never existed, he served his purpose."
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Just one week after Peter Bishop saved the day and was then wiped from existence, the truce between the two worlds remains intact and the two sides are forced to work together. Lincoln Lee joins the Fringe team as they investigate a shapeshifter case that is very personal to him.
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As the victims of a highly intelligent serial killer "Over There" stack up, the Fringe Division "Over Here" is asked to assist. As the two sides tangle and innocent people remain at risk, the suspect's doppelganger "Over Here," a professor who teaches Forensic Psychology, is brought into the fold and forces the team to consider the notion of sending civilians to the other side.
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When two 12-year-old kids bully another boy, they are found dead and in just hours after dying their bodies are shockingly in an advanced state of decomposition. As the Fringe team investigates the mysterious case, they uncover an amorphous figure claiming more victims. Meanwhile, Walter becomes increasingly distracted by his hallucinations.
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Olivia uncovers a dangerous force that may be connected to Walter's past experiments with the drug Cortexiphan. Their investigation forces Walter to leave the lab for the first time in years as he and Olivia head to Massive Dynamic in New York to examine old case files. Walter struggles with life outside the lab as he comes face-to-face with the demons of his past.
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In the aftermath of recent shocking events, things really escalate when the translucent shapeshifters return. As the threat and circumstances intensify, former Massive Dynamic scientist Malcolm Truss enters the fold. Meanwhile, Nina Sharp pays Walter a visit in the lab.
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The Fringe team must find the pattern between tragic time loop anomalies. As the investigation unfolds, Raymond, an electrical engineer, and his wife Kate, a professor of theoretical physics, enter the picture.
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When a man mysteriously dies by an invisible force, his body rapidly begins turning ghostly white. The Fringe team learns that this is not an isolated incident, and there's evidence that links the predator to someone who passed away with an unknown genetic disorder. Meanwhile, Olivia suffers from migraines.
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In an effort to find a way home, Peter journeys to the Other Side to confront Walternate. His venture proves more dangerous than expected. Meanwhile, Olivia receives a dire premonition from an Observer.
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Peter's visit to the other side intensifies as the alternate Fringe division faces off against a formidable new foe in a harrowing race against time.
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Olivia continues to cope with the ominous warning from the Observers, while Peter and the team track a girl with the mysterious ability to predict death.
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Our Astrid gets an unexpected visit from her Alternate, while Peter and Olivia track a killer using a toxin that has yet to be invented. Both universes collide in a case that pushes the boundaries of what is possible.
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Peter, Olivia and Walter come face to face with a mysterious and terrifying Fringe event as they get trapped in a town that there's no escaping.
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As the Fringe team investigates a mentally ill patient who appears to be connected to a series of murders, frightening clues and connections are uncovered that lead Olivia to some shocking revelations.
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Nina Sharp joins Olivia out for breakfast. Olivia announces she's in love with Peter, even though she barely knows him. She doesn't know how she has the other Olivia's memories. She's scared.
She tells Nina they should meet for breakfast more often.Nina reminds her they met at the same place last week, just like they do every Saturday. Now Nina's worried. Olivia promises to talk to Walter.
A woman comes home to her dark apartment and listens to a message on her machine, asking Jane if she's OK.Meanwhile, a man applies something like perfume to his badly scarred neck.
Jane looks at a picture of her with a man and turns around. The scarred man is standing her apartment. She runs and he grabs her. He starts to choke her and she screams, but suddenly she's not afraid any more. She looks at him like he's her long lost love and kisses him.
But the moment ends and she's afraid again. He wraps her face in plastic wrap, smothering her. He holds her close and gently lays her down. Then he swabs her neck and wrists with a Q-tip and puts it in a jar labeled "Jane Hall Sample".
Olivia meets Walter in the lab. Walter shows her the teddy bear Nanny cam he ordered -- it recorded September the Observer disappearing from the lab. There's a flash on the tape as the man disappears. He ordered equipment to slow down the playback.
Olivia gets called to Jane Hall's apartment. Her skin had a reaction to something on her neck. She's the second similar victim in a month. Jane's husband died under mysterious circumstances, she was returning from his funeral.
Broyles tells her in both cases, DNA from the dead spouses was found on the victim's necks -- but Mr. Hall was only exhumed 15 minutes ago.
Walter sees something surprising on the nanny cam video. Walter calls Peter, who is on his way out of town to keep away from Olivia, per Walter's orders. But Walter tells him to come by. "I think the Observer may have done something to your eye," Walter says.
They watch the video, which shows September approaching Peter. But the other Obervers didn't see it.
Peter was heading to New York to get away from Olivia. Walter admires him trying to do the right thing. He says Peter is a better man then he.Peter remembers the old Greek quote for "be a better man than your father".
Walter examines Peter's eye. There's something in there and it has writing on it. They bust out the overhead projector. The object says 228 ½ Morrow Street. Walter thinks eventually the address would have worked its way into Peter's mind.
The Hallses bodies arrive.
The scared man squeeges (ew) a man-sized tube out and distills whatever is in it down to a small beaker.
Back in the lab, Walter says Hall was drained of all liquid, including his pheromones. That's what burned Jane's neck. Pheromones play a role in love.
Olivia sees Peter's packed things and Walter lets slip he was on his way to NY.
Peter is currently heading to 228 ½. He finds an unlocked spartan studio apartment with Observer clothes in the closet and newspapers from important dates on the walls.
Back in the lab, Olivia tells Walter her own memories are disappearing. She wants Walter's help reversing it.
The scarred man sits in a park watching couples. He offers to take a photo of one couple, telling them they look so in love. He chats them up but stops when he sees they have a son. He finds another couple. (But we don't see them.)
Back in the lab, Walter whips up scents including road kill and makes Astrid take a whiff.
Olivia and Lincoln go through statements from the victim's friends, which say the couples were in solid, loving relationships.Lincoln has a hard time concentrating near Olivia, he finally asks if she's OK. He says he's there for her. He looks at her dreamily.
Walter explains that the perfume the killer is making has a rancid note, including a rare one made by only five manufacturers.
In the Observer's partment, Peter hears a beeping and finds a secret compartment with a briefcase full of Observer gear. One machine seems to be a kind of homing beacon.
Astrid calls Olivia, sending them to Empire World Fragrance, who fired Anson Carr a few months ago for theft. He's the scarred man. He stole the ingredient.
Cut to a man screaming to get out of a heat chamber where he's sweating profusesly. Anson turns up the machine, which is collecting the man's draining fluids.
Anson turns on a love song and waits, concocting man perfume. He opens a box and takes out a worn photo of a woman. He cries over it.
FBI teams tear up to a warehouse and bust in.They find Anson's lab. The equipment is still warm. The man is dehydrated toast. The victim's wallet IDs him as Andrew Sutter and he lives in Milton.
Peter takes the Observer's briefcase and homing beacon to Foxboro and follows the signal through the woods until the beeps get stronger. The ground shakes beneath him and a metal pod rises up out of the ground.
At a house in Milton, a woman comes home with groceries. She hears a noise. Olivia is at the door. She explains what's going on and they set up to wait for Anson.
As they wait, Mrs. Sutter explains they've been married 15 years. They were best friends in college, he was always helping her get over a broken heart. But as she talks about the difference between loving someone and being in love with them, it's clear their marriage wasn't completely happy. Lincoln listens.
Anson waits outside a house, dabbing himself with Andrew juice. Olivia and Lincoln wonder what's taking Anson so long. Olivia asks Mrs. Sutter if maybe her husband was having an affair. He was.
Cut to another woman alone in her house at night. She notices a door open and locks it, but when she turns around, Anson is inside. She runs, he catches her and tackles her. She stops resisting and looks deep into his eyes and caresses his face, kissing him.
But then it wears off. He covers her mouth as she screams and he starts choking her.But then we hear Olivia's voice telling him to let her go.
Anson stops and raises his hands.
Olivia asks him if he knows how much pain he caused. He says we're not meant to be alone and every human being has a right to know love. With the right chemical balance he could have given the world, "what you have," he tells Olivia.
He can smell that she's in love.
Olivia drops by Nina Sharp's apartment. She tells Nina about what Mrs. Sutter said about letting go of the possibility of love, which reminded Olivia of herself. She didn't like it, so she's decided to let things run their course.
She's ready to give up her own memories. Walter doesn't know how long it'll take. Olivia asks Nina to try to build something with her again if she doesn't remember their relationship.
Peter runs tests on the Observer's two foot tall metal egg pod. Suddenly, it lights up, casting a beam of light up. Peter runs upstairs and sees the Observer September standing there. He thanks Peter. The other Observers hid the universe from him, locking him out. What he lead Peter to is a beacon, so September could find his way back.
"So I helped you? And I need you to help me now," Peter says. He tells September about trying to get home and asks for his help.
"You have been home all along," September says.
Peter doesn't understand, he was erased.
There is no scientific explanation, but September believes Peter couldn't be fully erased because the people who care about him would not let him go and he wouldn't let them go.
"I believe you call it love," September says.
Peter asks about Olivia."She is your Olivia," September says.
The house begins to shake. September disappears, so does his beacon.
Olivia comes home. Peter is waiting for her. She can tell by the look in his eyes that he wants to be with her. They run to each other, the music swells. They kiss. Yay!
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On an airplane, a man we've seen before writes that a technology is too good to be true. He gets a bloody nose and goes to the bathroom. He swabs his tongue, mixes it with something and the vial turns red and he anxiously goes out to tell a flight attendant that they have to sedate him now. (It's the same opening as episode 13 from season 1)
He locks himself in the bathroom and tells them not to let him out. There are guttural screams from inside. In the bathroom he twitches a few times. We know what's coming -- he's about to turn into a giant beast and bust down the door.
Except that when the air marshal knocks and tells him to come out, he calmly opens the door, unchanged.
On the ground, he talks to TSA, chalking it up to a panic attack.
They go through his checked luggage and he doubles over with another bloody nose. In his suitcase they find a kit with needles and tiny vials.
In the bathroom, the man twitches and checks his eyes. This time they're turning green. The TSA agents go to call the cops, and the man busts out as a giant spiny beast. Return of the werecupines!
Olivia talks to a psychologist, resenting that she's trying to convince an FBI shrink that she's fit for duty instead of being out there trying to catch David Robert Jones.
The shrink asks about her sister Rachel, who Olivia says moved to Chicago with her daughter Ella, in order to be closer to her ex-husband.
After, she goes to Broyles who tells her they don't know if she's fit or not. But Rachel is still married and has a second child, Eddie.
Forty percent of the information she provided was incorrect; she's not the agent they licensed.
Olivia comes home to Peter, who suggests they take a vacation if she can't go back to work.Peter gets called to a case.
At the lab, Lincoln mentions Vertus air and Peter guesses the flight number. Walter comes out with a box of birthday presents he bought each year for his dead Peter, including a bottle of beer for his 21st birthday. Peter gives him a hug.
Peter recaps his old case: Marshall Bowman was an undercover cop given a designer virus to rewrite his DNA and turn him into a giant werecupine. But the plane crashed and he was burned to a crisp.Astrid says that's the guy, but the flight didn't crash.
They watch TSA security footage of the giant werecupine attacking.At the scene, Marshall is a giant dead werecupine.
Peter talks to his sister, who saw him a week ago. Peter asks her about Marshall's notes that say "once you get started there will be no turning back."
Marshall worked in France at a bank, but retired from being a cop six years ago -- he probably was undercover. Peter remembers Marshall was working with a partner who nearly transformed, too. He can't think of the partner's name, but wonders if Olivia will know.
She does: Daniel Hicks.
On the drive there, Peter asks Lincoln if he wants to talk about Olivia. Lincoln sees the way Olivia looks at Peter and is happy to leave it at that. Peter says Lincolns a good guy, but Lincoln is clearly struggling.
They pull up to Daniel Hicks' house and Olivia is waiting.
Hicks isn't there, but they go in and look. The house is in shambles, the fridge is empty and the windows are blacked out and the lights don't work. There's a medical waste bag in the kitchen.
Lincoln realizes Olivia doesn't remember recruiting him for Fringe, the nights they met at the diner.We see a giant werecupine race by, but they don't.
Lincoln goes to inspect the house and gets thrown to the floor by it. Olivia fires but it gets away.
Back at the lab, Walter stitches up Lincoln's shoulder. Peter looks at Marshall's werecupine body. They think the rapid mutation must have killed him. They haven't made sense of the vials yet.They notice track marks and a tattoo.
Olivia apologizes to Lincoln for showing up at the house and letting him get hurt.
Astrid runs Conrad Etienne Moreau, a scientist whose name Olivia remembers from the first case, but he died five years ago. So if he's not the one behind it this time, who is?
Walter announces the tattoo is Sumerian.Peter remembers someone they can ask.
With Lincoln mid-suture, he stays behind while Peter and Olivia go talk to the ancient book seller Edward Markham. Peter doesn't expect him to remember them.
They open by asking for a rare science fiction book then mention Sumerian.They show him the tattoo."Are you one of them?" he asks.
At the lab, Walter offers Lincoln peanut butter and bacon sandwiches. And then he casually mentions that Lincoln might be infected with the werecupine virus. He can't treat him until the virus take full hold, and then he's only 80% sure it'll work.
Back at the book sellers, they learn the tattoo means renewal or rebirth. Markham says there have been rumblings about a new cult out there obsessed with the guided evolution of man, mutation by design.
A woman comes home alone to her dark apartment. The werecupine is there. But when she sees it waiting in the dark she sympathetically says: "Oh baby, you're hurting."
She hugs it and injects him with something, telling him to think how special he's going to be, how special they're both going to be. "Like Adam and Eve," she says.
Peter, Olivia and Astrid mock the guided evolution chat rooms and Walter enjoys the family feel. Lincoln feels left out and waits to see if he's infected with werecupine virus.
Walter see a lab file cited on a chat room that he recognizes as a psychedelic product of he and William Bell from years ago.
Off to Massive Dynamic. Nina confirms it is one of theirs and checks their old project records. The contents have been erased. It was being overseen by David Robert Jones.
Back in the lab, Lincoln is chowing down on Walter's bacon. He has weird cravings, for onion rings and cheese cake. He stares longingly at Walter's love handles. Walter has an epiphany.
They come back and Walter excitedly announces that Lincoln is infected. But he'll be OK. He understands the creature was craving human fat -- that's what was in the bag, probably from lipsuction. Fat stores energy and energy is necessary for transformation.
They start to check plastic surgery centers for break ins. Peter wonders how the creatures get around without being seen.
Cut to the woman on a rooftop with her beast. He takes her gently in his arms and jumps off the building -- but then soars off into the night. A werecupine with wings.
Back in the lab, Walter makes Lincoln a mixture of wheat grass, penicillin, laxatives and mint to kill the after taste.He figured out the drugs Bowman had on him were to ensure the transformation doesn't occur too quickly. But they were in his checked bag.
Walter used Lincoln's infected blood to create a computer model to replicate the transformation. A werecupine takes shape on the computer screen.
Olivia and Astrid report there was a break in at a surgery center and bags of fat were stolen but now it's under lockdown. There are 45 others clinics nearby.The computer model finishes and they see wings.
They check to see how many clinics were in high rises. Just one.
Lincoln tells Peter he has to call Broyles for back up. Peter is debating how much trouble that will get Olivia in when she gets off the phone announcing she just spoke to him.
At the clinic, SWAT teams sweep through with night vision on. The beast is there but they don't see it sneak around in the dark.
Olivia and Walter wait at the lab, Olivia realizes werecupines are nocturnal, which is why Hicks' windows were blacked out.
Astrid tries to radio Lincoln but can't reach him. She calls Peter, telling him to turn on the lights to scare it out of hiding.
Peter flips the lights just as the beast jumps out at Lincoln. It's scared off him and Lincoln is able to get off a few shots, killing it.
He's taking a deep breath when the wife jumps out and attacks him. She has the drop on him and he's losing, when Peter shoots her.
She lives, and cries over her dead beast husband.
Back at the lab, Walter opens the presents he got for Peter. He's excited to play with them with Peter.
Olivia reports the wife is OK and the hospital is treating her with Walter's cure. But she has no idea who made the virus.
Olivia wonders where David Robert Jones is recruiting these people from. Walter says David Robert Jones has a God complex and is trying to control things like evolution.
Broyles stops by to talk to Olivia. She starts by apologizing and promising that she'll listen to him from now on.
He's been on the phone with his bosses for hours and they've decided that 60% of an Agent Olivia Dunham is still better than 90% of other agents. She's back in Fringe.
Elsewhere, Marshall Bowen's sister talks to her husband, who is having second thoughts. But she isn't. She thinks they can be children of the new world. He agrees and they do their injections. She has a Sumerian tattoo as well.
Cut to two beasts in cages, in a basement with other beasties from spiders, squids and all manner of new evolutionary weirdness. A man checks on the cages and walks up the stairs. They're on a giant freighter out in the middle of the ocean.
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Harvard UniversityLincoln comes in to the lab to see the cow in an FBI jacket. Walter thinks she has Seasonal Affective Disorder, so they're taking her to her favorite field. It's a group trip with Walter, Peter and Olivia and Lincoln feels left out.
Olivia gives Lincoln a small talisman with his dead partner's name, Robert Danzing, engraved on it. She barely remembers he was Lincoln's partner. He reminds her he gave it to her as a thank you for saving his life. It's Native American, with a maze and a person on it, with home in the center. He gave it to Lincoln because he moved around a lot. Danzing gave it to him to remind him he always had a home, he called it his tether.
Astrid arrives with files. The Other Side wants a detailed debrief of their run-ins with Robert David Jones and she is going because of the holes in Olivia's memory.
Lincoln goes to Broyles, telling him he could use the time away.
The Other SideA woman walks to her car on top of a parking garage late at night. A man grabs her before she can get to her car. He knocks her down and takes out a knife. Then they both see a disfigured person standing behind him, with a bloated face and stringy hair. He takes on the attacker.
Lincoln takes the files to the bridge and crosses over.Bolivia joins him. He vaguely tells her what's going on with his Olivia.
In the car, he watches a news conference of Walternate talking about opening up closed off zones of the city. The opening of the bridge is leading to fewer rifts on their side.
She asks him to settle a bet and asks his middle name: Tyrone.
At the scene, Bolivia rubs it in Captain Lee's face. They've been partners six years and he wouldn't tell her.
Captain Lee briefs them, there have been a string of vigilante crimes. The assailant's face is melted. It's the first assailant/victim they've found.
A man who looks just like the attacker packs things into a van. Nearnby, a Fringe team does a sweep and pronounces the area clear. They get a reading of a high level of tissue organics.The man hides in his van.
The team follows the reading and finds recent footsteps into a church basement, even though the zone's been uninhabitable for eight years.They find piles of melted bodies.
Bolivia and the Lees report to the church. Agent Lee asks to stick around on the Other Side to help, a random FBI agent asks to shake his hand. Bolivia explains that on this side, his Fringe team are heroes for helping heal their world.
The man, Canaan, goes to a soup kitchen for some food. One of the other homeless men tells him he has something on his neck. It's a bubbling patch that is oozing and looks like a bad burn. Canaan runs out.
In the church basement, they count 18 bodies, 19 heads.Olivia notices a bed, someone was living there. That would explain why he left his last victim behind, because he knew the zone was being opened and his lair would be discovered.
Lincoln notices a necklace and lifts it off the oozing body. It's a locket with a blonde woman's picture in it. As he lift the locket the head falls off and he sees holes in the roof of its mouth. He asks if they can calculate time of death.
Back at Fringe, Capt. Lee gets Agent Lee the info. Agent Lee asks Astrid to look for surveillance footage. He's not ready to talk about his theory yet.
Capt. Lee asks Agent Lee why he doesn't want to go back home. They decide they're not very alike. They compare histories to see where they diverged: they grew up in the same town, went to the same high school, had the same prom date.
Astrid gets a facial recognition hit on the woman in the locket. Her face has bubbly pink growth on it and the footage is from two days after she died.
Agent Lee tells Broyles he thinks the vigilante is a shape shifter.
He explains he's studied up on shape-shifters since his partner was killed by one. The earlier versions used a three-pronged device in their palette that left holes just like the victim in the church had. He can't explain why the other victims don't have the same wounds.
Broyles shuts him down hard and orders him to go home.
Canaan watches a young boy play soccer in a park, with tears in his eyes.
Two junkies get stoned out of their minds. One goes to the bathroom and the other is attacked by Cannan, who pulls a tube like an umbilical cord out of his mouth and jams it into the junkie's palette. The other one hides and watches in horror.
Astrid relays the report to Broyles. They lock down the area.
Agent Lee suggests they circulate the victim's mug shot, in case they are dealing with a shape shifter.
On the way there, Bolivia gets a report from Astrid that they've spotted the shifter. Teams converge on the area and satellites show he's heading toward Agent Lee. Over the comms, Captain Lee tells him he's a good agent, but Agent Lee wonders where their paths diverged.
Agent Lee sees the suspect and starts chasing him, he follows him into a building. He's looking for him in the warehouse when all of a sudden he gets tackled from behind.
Agent Lee's gun gets knocked out and the shifter gets it. Agent Lee is on the ground, defenseless, and the shifter aims at him, but takes pity and doesn't fire.
He runs and is quickly surrounded by Bolivia, Captain Lee and their teams. Agent Lee shouts at them not to shoot.The shifter surrenders.
Broyles gets the news back at Fringe Division. He makes a call, telling someone they have him in custody and giving the location."Thank you Colonel, we'll take it from here," says Nina from the other end of the line.
Agent Lee looks in on the suspect. Bolivia comes to get Lee to move him out, but he asks her for five minutes alone with the shifter to talk to him before he's taken into custody.
A man with a briefcase goes to the top floor of a building. He opens the case and assembles his high powered rifle.
Agent Lee dismisses the agents guarding the shifter, to talk to him alone. He asks the shifter why he didn't kill him when he had the chance.
He sees the picture of the young boy. Lee asks if it's his son, the shifter says it's her boy."Jones took you from them when he did this to you?" Lee says.
Jones came later, she left him first and took Daniel with her. "They just went on living their lives as if I was never there," he says.
He says he's not a person who drifts through life effortlessly. "I wanted to be needed or at least to be missed, do you understand?"Lincoln does.
Dr. Jones understood and promised to make him something better. He was supposed to be the first of a new breed of humans, but he was a disappointment.
Lee points that David Robert Jones is not worth protecting.The shifter says Jones promised he'd come for him, to fix him.
Lee walks out.
Outside, Captain Lee escorts the shifter to the transport van. The sniper takes aim, but misses. Olivia grabs her own rifle and takes aim. She hits the sniper.
Then Agent Lee sees that Captain Lee was hit. He's down but manages to ask Bolivia who else knew they were transporting the shifter.
Agent Lee grabs the shifter and tells him the bullet was meant for him, that Jones, the man he is protecting, just tried to have him killed.
"You can keep waiting for someone else to define you, to give you your place in the world. Or you can decide that you're not just somebody's broken puppet anymore. Choose!" Lee tells him.
Fort Lee, New JerseyNina surveys a room full of shifters in tanks. The sniper returns from his mission."I trust you have good news for me," she says to him.
"I do, we've tied up our loose end," he says. He says the red head nearly took his head off with a nearly impossible shot.
Alarms start to go off signaling a security breach. Nina wheels around and sees the sniper -- not actually the sniper -- at the computer. It's Canaan.
Bolivia and Agent Lee and teams of agents come down the hall. Nina makes it out the side door, but is stopped on the roof by helicopters.
Broyles gets a call that Nina has been captured.
Astrid comes in to report something to Broyles. She's upset.
Back in Nina's lab, Agent Lee finds that there's a tracking system for all of the shape shifters. An agent comes to tell Bolivia bad news. Captain Lee didn't make it.
Agent Lee goes through the bridge with Canaan (in sniper form).
Agent Lee tells Canaan there's a man there who can help him."I'm really looking forward to studying- helping you," Walter tells him.Lee tells Canaan he thinks he'll like it there, he won't have to wait for anyone to give him a home.
Agent Lee gives Canaan his talisman, "to keep you from floating away."
Bolivia goes through her Lincoln Lee's things and finds a picture of the two of them. Agent Lee comes back.
He tells her they have a lot of intel on Jones and he thought he might stick around for awhile, that she might need some help.They need each other. He, who loves another version of her, and she, who just lost her version of him.She says that'd be nice.
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Agent Lincoln Lee watches the funeral for Captain Lee from the car with Other Astrid. Olivia and Colonel Broyles stand in the rain. Olivia assures Lincoln's mother they'll do everything possible to catch the person responsible. Broyles looks guilty.
Fauxlivia talks to Nina Sharp in lock-up, offering her a deal in exchange for the name of Jones' mole. Nina won't play. She tells Olivia she won't be in prison long.
"It's your world you should be concerned about, because as bad as you think things are here now, things are going to get much worse," Nina tells her.
Our side, ManhattanIn a board room a boss harangues an employee who's in trouble because they didn't finish a presentation in time. So the boss had to miss his flight and they lost an account.
As the boss is speaking, about to fire the underling, suddenly he is seemingly yanked up out of his chair and thrust up to the ceiling, floating. Then he crashes to the conference table -- only four feet down -- but his body is pulverized.
Walter and Astrid arrive on the scene, where Walter is really glowy about seeing Olivia and Peter together.There are two victims who died the same way.
Walter looks at the victim and says the bones in his legs are totally shattered. His spinal column was pushed up through his torso, injuries that would come from greater velocity.
Walter notices marks across the victim's laps. Peter suggests they look like seat belt marks. Olivia gets a call about a third victim who died similarly in his apartment, he was a pilot.
Walter realizes the injuries look like they were from a plane crash.
The Other SideAstrid reports to Broyles that they confirmed Walter's suspicion, there was a plane crash on their side 90 minutes ago. There were three fatalities, two men and a pilot.
Fauxlivia comes in off topic with a list of 108 people with clearance to tip off David Robert Jones. She wants to start background checks and surveillance. She recaps the things DRJ has known, including that they were coming to his lab, they were tracking him and the latest that got Lincoln killed -- all tips Broyles gave DRJ.
Broyles says he'll try to cut through the red tape.But first he sends Fauxlivia to the bridge to pick up their counterparts for the plane investigation.
Our SideOlivia escorts Walter to the other side. He's planning to collect samples of the victims and return home. He appreciates her trusting him to do it alone.
Fauxlivia and Agent Lee arrive."Ah, my escort is here -- and by 'escort', I don't mean 'prostitute'," Walter says of Fauxlivia.
Olivia asks Lincoln how Fauxlivia is doing and tells him to take care of Walter.
Outside the bridge, Walter sees a list of hot spots where the damage is the worst. But Fauxlivia says it's getting better.
As for the plane crash affecting both sides, Walter never expected anything like it. Fauxlivia wonders if DRJ could have caused it."If Jones caused this, he's conceived of something Belly and I never did," Walter says.
Walter runs tests on the bodies with a tuning fork, a perfect G. He brought a hand from a victim from our side --it makes a G as well, but Walter says it should be a C. Each universe vibrates at its own frequency. Everything from the Other Side is G, ours is C.Somehow the dopplegangers were linked across universes.
They don't have black boxes on The Other Side, but they listen to satellite recording of the plane crash. There's a lot of yelling and beeping at the end with the pilot shouting that instruments are failing.
Whatever merged the two universes destabilized the aircraft. He thinks they attached something to the airplane.They wonder what the suspect is trying to prove. Walter has no idea.
Cut to DRJ meeting with someone on a park bench. He asks about their experiment with the plane. He tells the man to surprise him with the next one.
Broyles comes home and says hi to his wife and learns that someone is there to see him.Broyles finds David Robert Jones sitting on his couch. Broyles isn't happy to see him. DRJ brought medication for Broyles' son Christopher, who is responding extremely well to treatment. He used to be in constant pain, he was dying.
Broyles knows he'll have to answer for what he's done, but he's just trying to keep his son alive.DRJ warns Broyles he'll be calling on him shortly.
Our sideThe man DRJ met with rides in a cab with a briefcase. He gets out and a woman gets in. He leaves the briefcase.
The Other SideThe same woman shops in a pet store.
Our SideBack in the cab, the briefcase charges up. There's a loud noise and vibration.
On the Other Side, the woman pays for her items but is suddenly yanked across the floor and into a display. She starts spitting up dirty water.
Our SideA cab went over the bridge, the same time the woman on the Other Side died.
Both Astrids meet in the bridge. Our Astrid brought her doppelganger coffee -- her favorite.They conference with their people in the field, each reporting on their victims. They have the same name, both have broken left arms.
Peter asks what he's looking for. Walter reports from the Other Side to Astrid, via Astrid, to Peter. He has no idea.Peter finds the briefcase. There's amphylicite inside. It's David Robert Jones.
Broyles meets with Fauxlivia, Lincoln and Walter. Walter still has no idea what DRJ is up to. Walter complains about his pillow and Fauxlivia offers to put him up in her guest room.
With Fauxlivia and Lincoln out of the room, Walter blames himself for what's happening because he crossed over years ago. Broyles asks if he'd do anything differently.
Walter says now that he's met Peter as an adult, he's not sure he would.
Astrid surprises Fauxlivia by reporting that she ran her 108 names and found nothing out of the ordinary. Broyles gave her the list.
Broyles meets with DRJ, who gives him a small box he wants him to attach to the control panel on the bridge. Broyles reminds him the machine is healing the worlds.
DRJ reminds him he's healing his son.He wants it there before sundown tomorrow.
At home, Broyles prepares to give his son an injection into the port on his heart. His son is fired up about getting picked for kickball and winning and being told a girl in his class likes him. Broyles enjoys the quality time.
In the middle of the night, Walter creeps around Fauxlivia's apartment in her silk kimono and finds her drinking alone in her living room. She's hammered and looking over the evidence from Lincoln's murder.
She tells Walter she's looking for a mole.She has Lincoln's things but can't bring herself to face his parents without answers.
Walter makes her eggs to sober her up. She tells him there is no evidence at all about the mole. He cites Sherlock Holmes, "The Dog Who Did Not Bark" -- that no evidence, is evidence.
Walter suggests Broyles, but Fauxlivia dismisses him out of hand. He tells her no one should be above suspicion.
Fauxlivia visits Nina Sharp in lock-up and turns off the camera.She tells her they have Colonel Broyles in custody and he won't be able to free her.
Nina takes it in then says: "Phillip is irrelevant, he's just another pawn."She says DRJ will come for her.
Fauxlivia meets with Agent Lincoln Lee, telling him Nina confirmed her suspicions. Astrid interrupts to say no one has seen Broyles and his tracker was turned off.
Cut to Broyles outside the bridge with the device from DRJ.Broyles walks inside and passes security with no problem.
Astrid gets notice of the swipe.
Broyles goes through the layers of security to get to the bridge.
Fauxlivia and Lincoln race to the bridge.
Broyles reaches the machine, they get held up at the security checks. Broyles contemplates the device.
Someone joins him.
It's the other Broyles. He got his message.Fauxlivia and Lincoln arrive just in time to hear our Broyles report that Col. Broyles turned himself in. He tells Fauxlivia he's sorry.
Later, Fauxlivia and Lincoln say good bye to Walter at the bridge. Walter tells her not to judge Broyles, he was trying to save someone he loved.
Lincoln sticks around, telling Fauxlivia he still wants to find everyone responsible.
Broyles is escorted to his cell, past Nina Sharp.
Back on our side in Walter's lab, Peter and Olivia race to hear what he's found. He says DRJ was just conducting a test, taking readings. He wanted to find a common denominator, a frequency to link both universes.
If Broyles had uploaded the device to the machine, Jones could have collapsed both universes.
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Nearly 25 years in the future, the Observers have taken over and rule humanity with a rod of iron, using Fringe agents as a regular police force against "natives". A small group of resistance-friendly Fringe agents, including a young woman with special abilities and a special connection to the original team, work to free the original Fringe team from amber to help them fight the war.
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Walter leads a presentation to the teams from both worlds. He thinks he's found out what David Robert Jones is up to: he's trying to collapse our worlds.
They would combine and create a big bang, mutual destruction on both sides. He would do it to create another universe where the laws of physics and nature are controlled by him.
It came to Walter in a dream. This makes some of the other Fringers skeptical, but Walternate suggests they consider it.
Sydney, Australia. A woman follows a map to precise coordinates, wearing a clock counting down past one minute. A man does the same in Bejing, China and another woman in the Himalayas, Nepal.In Manhattan, another man does the same.
They follow their maps to the locations -- on a rooftop, in a stream, in the middle of the street and shut their eyes and wait. The universe starts vibrating around them, the veins in their foreheads bulge. The ground cracks under the man in NY.
Peter reminds them about the destruction of Westfield, where one part of town was protected. Walter thinks DRJ has built a safe zone where he and his creations will be safe.
Walternate gets a message from command and leaves the room. Everyone else gets calls shortly after.
Multiple reports of earthquakes all over both worlds.
Fringe Division, the Other SideThey all started at the same time and were between 5.7 and 7.1 on the Richter scale. The 27 locations of the quakes were the same in both universes. Fauxlivia thinks he must have had an amphilicite trigger.
Our SideWalter examines shoes from the epicenter in the earthquake in Manhattan. They vibrate at the key of E -- not the frequency of either universe. He thinks Jones is trying to tune the two universes. The vibrations are weakening the barrier between the two universes. If he does it enough times in the right locations, collapse is inevitable.
At Fringe DivisionLincoln gets a visit from a childhood friend named Nick Lane (a childhood friend of the other Lincoln). He had a vision of the earthquake but didn't know it was actually happening.
HarvardThey have footage of the woman in Sydney, standing still as everyone else runs. They wonder if she had a device on her to trigger it.
Olivia gets a call from Lincoln, at the bridge. He tells her about Nick's vision and that it sounds like he saw our side, not the Other Side where Nick is. He described a Manhattan without the Twin Towers. Olivia recognizes the name.
She looks at the video from Sydney again and realizes it's Sally Clark. Sally and Olivia and Nick were in the Cortexiphan trials together. David Robert Jones isn't using amphilicite, he's using Cortexiphan subjects as the devices.
Walter explains: Nick and the Cortexiphan kids are using their alternates to draw on their frequencies to merge the universes.Peter wonders if the connection between the two universes is facilitating what they're doing. Peter suggests closing the bridge, shutting down the machine. That would also stop the healing on the Other Side.
Olivia has another idea.
Fauxlivia brings Nick to the bridge and then to Walter's lab. Walter injects him with Cortexiphan. The idea is that amping his up will help Olivia locate the Nick on this side who's participating in the earthquakes.They link the two of them with forehead wires. Olivia watches Nick pass the Newbery/Rockpoort train station. Peter and Lincoln head there with a team.
Olivia sees that Nick has a map and is looking for something. She sees him on the Salem Bay University campus. He's standing in a quad and looks at the timer counting down past 15 seconds. He's going to trigger another earth quake.
Peter sees him and the teams converge. They get him but in the lab Astrid can see reports of seismic activity from around the globe.
Nick sits in holding. He has a scar on his forehead. Broyles tells the team the quakes are causing fluctuations in the earth's magnetic fields. They have Nick's watch, the tech is from the Other Side. They wonder how many more quakes it'll take to collapse the universes.Walter is surprised it hasn't already happened.
Broyles has been called to Washington, they want to discuss shutting off the machine.
Olivia wants to interrogate Nick Lane. She immediately asks him where David Robert Jones is. Nick says he can't tell her. He tells her they're on the same side. He reminds her about what they prepared them for as kids. The war they warned them about is happening. He says Jones is on their side and is protecting them.Watching, Walter figures out what he's talking about.
Nick only works with Jones, he doesn't know the others. He thinks the damage the earthquakes are causing on the Other Side will destroy it. He says there's one more offensive left and the Other Side will surrender. Olivia tells him Jones is using him and there is no war.
Peter takes apart the timer on the Other Side. He talks about closing the bridge with Lincoln. He would at least appreciate that things would go back to normal. He would stay on our side, he tells Lincoln, saying he's come to believe that home is where the heart is.
They notice the timer has reset. It's counting down from 6 hours.
In holding, Olivia brings it to Nick, telling him that in six hours, everyone he loves may cease to exist. She says he's the only one who can stop it from happening. He tells her about having bad thoughts in college and that he had to make it stop. He was going to kill himself and had the knife in his hand when his parents called. His sister had just slit her wrists, his emotions have reverse impact.
David Robert Jones found him three years ago telling him he needed warriors. DRJ taught him how to channel his power and control it.
Olivia tells him she's worked with the Other Side and they're not our enemy. She tells him about closing the bridge and that he can help all those people.
Nick helps them. Walter tells him their theory about DRJ's plan to create a safe zone with a force field. Nick says DRJ usually came to him, but one time he met him in a warehouse.He takes them to it.
Teams go in. They hear a loud mechanical noise.
In the car outside, Nick is nervous and antsy. He tells the agent with him that he's pathetic for not questioning DRJ, that he should have just killed himself."You feel that don't you?" Nick asks the agent.
Inside, they find nothing. They get called back outside, where the agent has stabbed himself.
Nick escaped.
At the bridge conference room, the clock is at 47 minutes. Broyles says Washington is leaving the decision up to the people in the room.
Walternate and Walter agree they have to close the bridge.
At the machine, Peter connects to it and initiates a system overload. The power will surge and they'll shut it down.
Walternate tells Walter that Peter is remarkable, smart and noble, all the things he would have wished for him. Walter excuses himself but Walternate finds him in the hallway.
"I know what you're afraid of. It occurs to me, so I know it occurs to you to: If the machine stops working, Peter may disappear," Walternate says.
"I believe it brought him here, I believe it may take him away," Walter says.
Walter has come to accept that Peter isn't theirs.
The overload is near. Lincoln finishes talking to Broyles. Lincoln reminds Peter what he said about home being where the heart is, then he looks at Fauxlivia. He thinks he's found his.
Fauxlivia tells Olivia there's a lot about her she admires.
Lincoln joins the other team.As the machine nears overload, Walter prepares to shut it off. The teams face each other.
It's time.
He shuts it off.
The room shakes, the machine blurs and on our side, the Other Side disappears.
Peter is still there. Walter tells him he'll miss them.
(Eight minutes remain on DRJ clock.)
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In the first of a two part season finale, a mysterious Fringe event causing people to spontaneously combust forces Walter to revisit his painful past, while the Fringe team faces off against David Robert Jones to save the world, or worlds.
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William Bell shows Walter his very own universe of hybrid creatures on a hologram. He's excited to finish making it. He says couldn't stop it now if he wanted to.Bell is chalking Walter's arrival up to divine intervention. He's excited to share the moment with his "dearest friend."
Peter and Olivia return to the empty lab. He asks her about the "Jedi mind trick" she pulled on the roof with David Robert Jones. She's uncomfortable, but chalks it up to cortexiphan. She agrees to let Walter run tests when he returns.
Olivia gets a call from Jessica (Rebecca Mader), who Olivia cured of nanites with her kinetic powers. Jessica is worried someone is following her. We see someone standing in her kitchen. Olivia says they'll be right over. The person in Jessica's kitchen is September, our favorite Observer (Michael Cerveris). He starts to follow her through the house, but he walks over a symbol on the floor that glues him in place.
Olivia and Peter reach Jessica's house. The door is open, her purse and phone are on the table.There's a big hole cut out of the floor where the Observer was trapped.
Broyles calls, Astrid was just brought to the hospital with a gunshot wound following an anonymous 911 call.Astrid is out of surgery.
At the hospital, Astrid tells them they went looking for William Bell in the waterfront warehouse. She wasn't found there. She feels awful she couldn't protect Walter. She tells them where to find the warehouse and that it was full of strange animals.
Olivia and Peter go to A1 Imports warehouse. She wonders about the connection between the nanites and his using the sun's power to collapse an oil reserve.
The warehouse is empty except for the Observer, glued to his piece of cut out floor. He tells them he's not there of his own volition.
Jessica walks out with a gun on them. If they ever want to see Walter alive, Olivia has to drop her gun. The Observer is immobilized and can't help. She works for Bell, she was infected intentionally.
The Observer is concerned about the events in Olivia's life and Bell said if they put Olivia's life in harm's way, he'd appear.
She fires at the Observer three times. He catches each bullet. They operate in hyperattenuated time -- they can move very fast.
She takes out a gun Bell invented that shoots faster. She shoots. The bullet hits the Observer. Olivia gets angry, asking Jessica what she wants.
Jessica shoots at the Observer again, but Olivia stops the bullets with her powers and flings them back at Jessica, killing her.
September is surprised they knew how to trap him. Peter scrapes the glowing symbol off the floor and frees him. The Observer doesn't know where Walter is. Now they know how the Observer gets shot.Olivia asks him about what he told her at the Opera house, that in every version of the future she has to die.
September says it hasn't happened yet for him so he goes to investigate the future and find out what he meant.
They take Jessica's body back to the lab to interrogate her dead body. Nina Sharp shows up to help, not caring for now how Peter knew they had the technology.
Olivia is angry about being manipulated to activate her powers. Nina figures William Bell needs something only she can provide.
At sea on Bell's version of Noah's Ark, Walter asks Bell why he's doing this.
Bell tells him this was all Walter's idea. He was angry with God after Peter died twice. He wanted to create his own universe that would operate by his rules. But when he realized he could actually do it, he got scared and had Bell take that part of his brain out -- to put the genie back in the bottle.
Bell got cancer and started dosing himself with cortexiphan to slow it. He says it's their destiny to act as gods since they're able.
Walter objects."Dear friend, even if you deny it now, you've always been playing God. I am," Bell says.
Back in the lab, they jolt Jessica and she starts talking. Her eyes go googly and they try to get her to focus what she's saying. She says he's on a boat. They ask how he's going to collapse the two universes. She says he needs an energy source. They can't get her to say what he's going to use.
Olivia grabs on to her and demands and answer, but she blows out all the electricity in the lab and essentially re-kills Jessica.
Olivia realizes she's the energy source.
They scan her, she's giving off a ton of electromagnetic energy. Nina thinks she can trace Bell if he's using that power.
The go to the FBI and find a tanker left Boston port 6 hours ago but it's not on the radar. Nina explains that Olivia's frequency will match the one where the universes are overlapping, so they search for it. He'll be hiding out there, in the eye of the storm.
Olivia goes to an empty room to contemplate what Bell has in store for her. Olivia feels the same way she did when Bell was doing experiments on her as a child. Peter reminds her this time she's not alone.
On the ship, Walter looks at an old gun in a case in Bell's office. Bell insists he look out the window. The sea is roiling and full of electrical charges and creepy storm clouds.
In the lab, they find Bell's frequency. Broyles calls for helicopters. Olivia, Peter, Nina and Broyles head out. On the ship, Walter begs Bell to stop.Bell says they deserve it.
They get to the spot and no one can see the ship except Peter, because it's on the other side. Olivia can jump between universes and Peter can see it.Nina assures her she has the power.
Peter and Olivia climb out of the chopper."If you've lost your mind, now would be the time to tell me," she says to him.Peter gives directions to the chopper pilot and they jump.
They phase into the other world and land on a container.
Bell recites Yeats as Walter fiddles with the old gun. Bell doesn't stop him.Peter and Olivia bust in.
Bell welcomes them as his Adam and Eve. Peter aims at Bell and commands him to stop the collapse, but Bell explains that the chain reaction has begun and it can't be stopped. With every breath Olivia takes, they head toward the inevitable collapse.
Walter aims the old gun. He shoots Olivia in the forehead.She drops, the electrical storm stops, the ship appears on our side on a clear day.
Peter runs to her."You killed her!" he says."Yes, indeed he did," Bell says. He rings his soul Bell and laments to Walter how happy they could have been. He phases away.
Walter tries to get Peter's attention, saying they only have a few minutes. Peter is gripped with pain and crying and holding on to her. Walter slaps Peter to get him to focus and calls for a letter opener. They put Olivia on a table.
Cortexiphan is regenerative and her brain is soaked with it. He thinks if he can get the bullet out, she has a chance, just like his lemon cake.
He digs the letter opener into the base of her skull to create an exit wound. Using a snapped off antennae he drives it through Olivia's skull. He hopes that any damage he does will repair itself. He taps the antennae in her head and the bullet casing pops out the back of her head.
They both wait.
Slowly, the bullet hole closes. Olivia starts breathing.
In DC, Broyles learns that there are no traces of Bell anywhere. His animals are being cryogentically frozen for his team's future study. They're granting his funding request and he's promoted to general.
Nina greets him outside. He asks her to run the new fully funded science division. "Nina, you want a job?" he says.
In the hospital, Peter and Walter wait in the hall. Walter thinks after all this Olivia will have almost no cortexiphan in her system -- no more lighting fires with her mind.
A nurse walks by with a tray of urine samples. Walter asks if it's lemon jello. When told what it is, he says "well, in that case no thank you. I'm more pekish than thirsty."
He thinks Olivia will be normal now. Astrid joins them. The doctor tells them Olivia's ready to go home. Peter goes to see her.
Astrid presents Walter with a bouquet of Red Vines.He gets her name right.
Peter brings a newspaper in with a house for them. She thinks it's perfect.
"I suppose he was right, the Observer, in every version of the future you had to die. But I don't ever want to lose you again," he says.
He hugs her but he can tell that there's something else.
"Peter, I'm pregnant," she says.
It's a big happy family reunion as Walter and Astrid join at the doorway.
Harvard University
Walter goes poking through the fridge and makes himself a late night PB & J. September joins him.
"We have to warn the others -- they are coming," he says.
"Who's coming?" Walter asks.
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A hazy dream of Peter and Olivia in a park watching their daughter Henrietta play with dandelions. There's a loud noise. Something is wrong. A building disappears from the skyline and Observers walk out of thin air toward them. Henrietta is between her parents and the Observers. There's a white light.
Later, in a triage center, Peter frantically looks around for his daughter. Olivia is being tended to.Peter wakes up in his house.
Walter is asleep on the couch, Peter checks on Henrietta in the bedroom. She calls him dad. She holds onto a bullet fragment she wears on a necklace.Walter looks out the window at the world as it is now, light reflects off something and dances on the wall.
Astrid gives Peter some "egg sticks" she found in the fridge and welcomes him to 2036. She argues with electronic scrabble that naugahyde is in fact a word, a very quality premium pleather.
Walter is ready to look for Olivia. The last time she spoke to her she called him from Columbus Circle in 2015. Then she disappeared. He sent her to find something that was part of the plan to defeat the Observers.
He and September worked on the plan and after they completed each component the information was scrambled in Walter's mind, a precaution against being read.
He had to retrieve something from Grand Central station for the plan to be clear, that's what Olivia was getting when she disappeared. Two days later, Walter ambered them.
Peter promises Henrietta that if Olivia's still alive, they'll find her.
They head out in a van to the dirty, dystopian future. Columbus Circle is a graffiti, junk filled mess, surrounded by barbed wire. Central Park is gone. They paved it to build a machine that pumps carbon monoxide into the air, there's one on every continent. The environment is too oxygen-rich for Observers, in a few more years the effects will be irreversible and the average non-Observer lifespan will be reduced to around 45 years.
Walter remembers Olivia was running when she called him. Astrid points out the amber down the block, they had discussed using it to hide in as a last resort. They check out the amber and find four people-sized holes removed. Amber gypsies.
Henrietta takes them to a black market and points Peter toward the gypsies. They might recognize her from Fringe. She gives Peter and Astrid cash, and walnuts, to close the deal. The amber dealer points them toward the "freshest cuts" but doesn't like something about them and presses a red button.
Walter talks to Henrietta. For him it was just two months ago that he took her to a carousel as a little girl.
Peter and Astrid check out the ambered bodies, looking for Olivia. They go back to the guy at counter and Peter shows his walnuts, describing Olivia. She was sold.
Cut to Edward Markham the rare book dealer at home, watching "Maverick" on TV. He's using Olivia in amber as a table. His doorbell rings. Someone asks for Markham, he grabs a gun and Peter, Henrietta, Walter and Henrietta bust down the door. Peter easily grabs the gun.He sees Olivia. Markham loves her and says he wasn't going to hurt her. She's supposed to fall in love with him when she wakes up.
Back at the black market, the amber gypsy calls in "level 4" intel. He holds a card that says "Future in Order" and demands vouchers for his "loyalty."
Back at Markham's, Walter is transfixed by the old stuff. An Observer appears in the doorway."Resistance is futile," he says, aiming a gun at Walter.Henrietta shoots the Observer. "I feel like I've heard that before," she says.The Observer knocks her door, but she shoots again. Outside, soldiers appear. Walter's still inside but Astrid, Henrietta and Peter have to leave him to get away.
Safely away, Peter gets Olivia out of the amber. She ambered herself. Peter introduces her to Etta. The last time Olivia saw her she was three years old.
After their reunion, Olivia turns over the item she got for Walter at Grand Central Station.
Captain Windmark, the head Observer, comes to talk to Walter, who is handcuffed to a chair.
"I'm very interested in you, I don't know why you're alive," Windmark tells him. Walter thinks of music, which the Observer doesn't understand."You seem much more interesting as a human being, than as a vegetable but, quite frankly, all things being equal, I don't mind which way you end up. The choice is yours," Windmark tells him.
Bronx, New YorkEtta passes a retinal scan and tells everyone to wait as she goes inside. There's a computer filled control room, with one of her fellow resisters dead inside, the other two mourning. She needs their help.
Waiting outside with Peter, Olivia realizes they didn't save the world. Etta is still trying.
Peter knows what she thought of him when he wouldn't leave Boston and go to New York with her after Etta disappeared."Peter, we lost our child and in our grief we were just incapable or unable of being what we needed to be for each other, that's all it was," she tells him.
Olivia went to save the world, but he couldn't stop looking for Etta.
Etta introduces her parents to Amel, a resistance fighter. He identifies the equipment Olivia has a "Transilience Thought Unifer Model 11." It retrieves specifically marked thoughts in your mind and unifies them, it was how Walter would know his plan with September. But it won't turn on.
Someone announces they've found Walter. They follow him on traffic camera footage. They worry what Walter might have already disclosed to the Observers.
Cut to Walter trying to keep the Observer from hearing his thoughts. Windmark realizes Walter is "partitioned" with information out of sequence. He begins probing into Walter's mind, and Walter twitches violently. Blood vessels burst in his eye.
Windmark thinks one of them helped Walter partition his thoughts. He demands Walter put them together. Walter tries to resist. His noise begins bleeding as he fights.Windmark could unify them with a Unifer but he would have to break Walter's biologically specific key. Windmark sees young Etta and wonders how a small child could be helping Walter.Walter passes out.
Etta tracks Walter to a building that no one has ever successfully broken into. Amel mentions tech they've been developing that would make them appear dead so they can get in, like a Trojan Horse.
Etta drives up to Fringe HQ with bodies in the back of her van -- the resistance fighters and Peter. Astrid hides in the van. A Fringe agent who's a little sweet on Etta scans them, showing they're dead. He tells her he was raised to level 6, then conspiratorially tells her that her boss Agent Foster was a double agent and was found in amber with someone named William Bell. He doesn't know what happened to him.
Back in the torture/interrogation room, Windmark won't let up on Walter, asking about his plan to defeat to them.
The bodies are brought into a room, Etta shoots the guard and wakes up Peter and the fighter.Peter and Etta sneak through the halls and let Olivia in a side entrance. They go to the control room that's pumping carbon monoxide for the Observers to breathe. Peter cuts the wires to the machine.
Back with Walter, Windmark says they're done there and Walter's brain will make an excellent specimen. When the carbon monoxide machine cuts out, Windmark leaves and Peter and Etta bust in. Walter is wiped out and can barely stand. They help him out, shooting their way out of the building. They get back in the van and speed away.
Walter wakes up enough to ask "Afro" if she has any music.
Windmark watches the security footage and recognizes Etta. "Hello little girl," he says.
Back to safety, Walter is happy to see Olivia. Peter shows Walter the Thought Unifer. It turns on as soon as Walter touches it, but he doesn't know what it's for or what the plan was. Astrid shows him William Bell's severed hand in amber, which Walter said they needed to access one of his storage facilities. Walter doesn't remember any of it. "I've failed myself, I've failed the world! What is wrong with me?" he starts shouting.
They realize it's like the parts of the plan were taken. Etta says it's more like they were destroyed when Walter was fighting it. He won't heal. "The plan is gone," she says.
Walter sleeps fitfully in the other room. He wakes up and sees flashing sunlight on the wall. He goes outside , in his bathrobe and boxers, to find the source of the reflecting light. Someone has hung CDs up on twine and the sun is bouncing off them. Walter picks up a bag nearby, it has a CD in it labeled "Trip Mix." He puts it in an abandoned taxi and listens to a synthed out "Only You" by Yazoo. He notices a dandelion growing tall through the cracks of the dirty, broken concrete.
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Back in the field of memory, Etta the young child picks dandelions and Peter and Olivia enjoy a lazy picnic. Peter calls for her and as she runs toward him a building disappears from the skyline and Observers appear. Olivia gets up and races toward her daughter, but there's a flash of white light.Olivia remembers waking up after the blast in triage. Peter looks around for Etta and gets more and more frantic as he can't find her.
In the future/present, Peter wakes Olivia up from her nightmare. He reassures her that the family is back together, even thought it feels like it all just happened a few months ago.
In the kitchen, they find Walter with the thought unifier strapped to his head. It's having adverse effects, he's talking out of sequence. But he's determined to keep trying to retrieve the plan to defeat the Observers from the depths of his memory. He lapses into Swedish.
Olivia comes in and asks Walter if he might have written it down. Etta explains they can't get into Harvard, it's been taken over by Observers."Well that's not a problem for someone who's done acid," Walter says.They can use the steam tunnels for access.
He leads the group to an access point outside the barricade around Harvard. They race through a tunnel, dodging hot bursts of steam. They come out near the lab and make their way inside. It's covered in cobwebs, and half of it is in amber. Walter assumes he did it to protect it.
He sees his Betamax recorder on a tripod inside the amber. "I don't think I wrote anything down, I think I was making a video," he says.
They hear a door open. A guard comes to investigate. They cuff him and go through his things finding, among other things, a bag of bread crumbs. He's Gale Manfretti, a Loyalist. They decide what to do about him and wonder how he happened on the lab.
Walter decides he needs a laser and Olivia suggests he make one. They need to turn the power on from the sub basement of the science building. They wonder what they'd be walking into.
Etta points out Gale would know. She shuts the door and starts to interrogate him. She takes out a device that he recognizes and is afraid of.
She put a probe on each of his hands and asks him what the science building is used for. When he doesn't answer, she zaps him and he writhes, phasing in and out of time. He seems to age 20 years."I don't think you want to waste any more precious time," she tells him.
In the lab, Walter destroys a laser disc player for the laser. Olivia notices pigeons flying through the lab.
Olivia wonders what Etta is up to with Gale the guard. She checks on him and finds Gale is an old and wizened.
Etta explains it's an Angel device, it stirs up the atoms in his body and can age him 25 to 30 year on a full charge. The idea is that he gets so disoriented he loses the will to lie.
Olivia goes to give him water, but Etta says it'll kill him. Etta defends her methods, saying that loyalists aren't worth crying over. "This is war, and we're losing," she says.
Walter calls Etta for her necklace, he wants to melt down the silver for solder. Etta hands it over.
Gale tries to convince Olivia that people will come looking for him, but she doesn't buy it. She takes out his bread crumbs, she thinks he came to feed the birds and isn't even supposed to be there. Olivia urges Gale to talk before Etta takes more years off his life.
"I'm trying to help you," Olivia says."You don't have the authority to do that, do you?" he says. "You know a Loyalist doesn't just walk away when they've been captured by the Resistance."
"How can you be so sure?" she asks."Where are you from? You're new to the Resistance," he says.
He tells Olivia he knows he won't survive this so he'll tell Etta what he wants to know if Olivia agrees to tell his son he's not coming home. He doesn't want his son looking for him when he's not coming back .
Etta comes back in the room and Olivia gives him her silent agreement. Before Etta can dial the device back up, he tells her that the main power is still in the building and everyone has an access code. There are rumors of experiments in the building.
He gives them the numerical code, but mentions there's an ocular scanner. Walter is appalled by the Angel device, which Etta says the Observers invented and the Loyalists use.
He examines Gale's eye, which is cloudy with glaucoma. He calls for a scalpel and a spoon.
Later, Walter dissects the cornea of an eyeball. He flubs it and calls for another. He's working on a pig's eye, looking at a close-up of Gale's eyeball to copy it.
Olivia traces a Loyalist bar code onto Peter's cheek, lamenting the state of the world. Etta's up next. She thanks her mom for agreeing she's the best person to go to the power station. "I know you like to be in control, so do I," Etta says.
Peter, in Loyalist uniform, and Etta, walk through the halls of Harvard.
Left alone with Gale, Olivia has questions."Why does someone join the Loyalists?" she says.
"Pain," he says, telling her about one of his children dying in a Resistance explosion. After that, he just wanted to be safe. He was angry at the hopeless Resistance. As a Loyalist, he doesn't have to worry about the safety of his other son.He tells Olivia the world would be a safer place if the Resistance just stopped trying to fight.
Etta punches in Gale's code and Peter holds up the pig's eye for the scanner. It passes, but security wonders why he's in that sector and radios him. Olivia hears his walkie and holds it up for him, feeding him lines. Peter and Etta wait outside the door. Gale makes up a good enough excuse that security lets him in.
On the other side, Peter and Etta sees experiments being performed. Etta sees the dismembered head of her friend and former boss Simon Foster (Henry Ian Cusick).
She pulls out her gun to charge the room and Peter has to hold her back, reminding her to focus on the bigger picture. "There will be a time for vengeance, I promise," he says.
Back in the lab, Gale sincerely asks Olivia if she thinks they can win."We have to win, so that all the people who died, including your son, didn't die for nothing," she says.
Peter punches things into the mainframe to reroute power to the lab.Walter and Astrid get started using the laser to free the Betamax.
Peter and Etta return to the lab. Etta wordlessly goes into Gale and releases his cuffs, she tells him he's traveling.
She plans to turn him over to the Resistance and let them get whatever they can out of him.She tells Olivia that Gale doesn't have a son and only gave her the code because he saw weakness in her and thought maybe he could convince her to let him go. Olivia tries to talk to Etta.
"You don't know my world," Etta says."You're right, but I hoped for you, that where ever you were, that you weren't hardened by what happened to you. It's not that I don't see what the Observers have brought, I do, but what concerns me more is what they've taken away," Olivia says.
"This is the world. It is what it is," Etta says. She leaves Olivia alone with Gale. He gives her his address and son's name. She says she'll keep her word.
Etta goes to Walter for a sedative, then takes Gale away.
Peter frees the Betamax from the amber.
Etta drives Gale out to a field. He confesses he doesn't have a son, he hoped Olivia could convince her. He says he became a Loyalist because he's a coward.
She lets him go. He promises to help the Resistance, pointing out there aren't many Resistance fighters with an active tat ID.
He saw a certainty in Olivia that he's never seen before. "I felt, for the first time, that we were supposed to win," he says. He asks why she's letting him live.
"Something that I saw in her eyes as well. Pity," Etta says.
Walter takes the cassette out of the player. The laser might have damaged the tape. They press play.
Walter addresses whoever is watching, saying he's documented all the parts of the plan on video tape and they have to retrieve all of them to follow the plan. "If successful, this plan will restore us and rid the world of the Observers," he says.
Olivia's phone beeps. She pulls it out and sees video of Gale going free. Etta says she's on her way back.Taped Walter says "you are humanity's only hope."He tells the watcher to go retrieve the first tape, then he deploys the amber.
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At the Former Harvard UniversityWalter backseat drives as Astrid works on burning a Betamax cassette out of the amber in Walter's lab. He pops it in for everyone to watch.He appears on the screen and starts with taking a bong hit.It's tape 3, not tape 1.
On tape, he explains the viewer has to go to Pennsylvania. He gives coordinates. Etta punches it into her GPS.
Walter finds his weed stash and makes excuses to stay behind while they head to Pennsylvania. They bring him along to the woods of Pennsylvania.
Walter can't remember what he was doing there 21 years ago.
They notice someone watching them from behind a tree off the side of the road. They head into the woods.
Etta tells her mom about imagining what she was like as she grew up and that Olivia is even better than what she'd hoped.
The group is stopped when they are surrounded by people with guns. They all have black crusty patches all over their skin. Walter worries it's communicable. The group leads them to a sophisticated encampment in the woods. One man frisks Peter and, seeing his revulsion, wipes his crusty hand on Peter's face.
Finally, someone recognizes Walter, then Peter and Olivia. He introduces himself as Edwin, and when Walter hesitates to shake his hand, Edwin tells him they were exposed when they got here. Walter knows he's supposed to retrieve something.
Edwin takes Walter to a subterranean lab. He has to pass through an electromagnetic discharge to enter. Data cubes hold info on every event since the invasion. There are a lot of stories about the Fringe division.
The skin condition is related to the area, but they won't leave because it's where their records are. "We just want to be left alone to record history. No one wants to come here, which is perfect for us," Edwin says.He suggests the Fringe team leave to avoid catching whatever they have.
Walter explains about his forgotten plan. Edwin searches the archives for a record that Walter visited previously.
Edwin's son River, a Fringe buff, shows Olivia the Fringe comic books he made, starring them. He thinks they're heroes for fighting back.
Back at Harvard, Astrid tries to unscramble part of Walter's tape in which he says what to do after they get to Pennsylvania. He says: "You will need to locate a mine."She calls Walter about a mine. Edwin confirms there is an old gold mine nearby.
Back in the city, Captain Windmark gets word that the Fringe group has been spotted in Northern Pennsylvania.
Down in the old mine, Peter and Etta pull something up from a rope in the mine shaft. It's a desiccated body.Walter notices the same bark-like fungus on the dead body. He wonders if the mine might be the source of the ailment and says they can't go further until he runs tests.
A Loyalist guard calls Anil, Etta's Resistance fighter friend, to give him a heads up that Etta has been located.
Etta gives Peter an apple pill, which prompts him to remember fantastic apple pie he and Olivia had at a restaurant in Boston. Even with her total recall memory, Olivia doesn't remember the name.
Walter gets test results on the body, finding the man died of asphyxiation. His body shut down trying to block out the infection, which he was covered in. Walter thinks it comes from something in the mine and the high levels of CO2 the Observers are pumping into the atmosphere. Edwin and his people are far enough away to be affected, but not killed by it.Edwin comes to show Walter an entry in his archives.
Five weeks after the invasion, a man came and went down into the mine. He gathered several rocks with a reddish hue. He was late 30s with reddish hair, his name was Donald. He was taken away by two Observers. Walter can't imagine why he'd want rocks.
Olivia notices a patch of the infection on Walter's hand. Olivia has a spot on her neck. Walter slices the bit off Olivia, for now it's removable.
Edwin brings Walter supplies to make a suit so they can go in the mine. He needs things from the van. Peter and Olivia go. Etta gets a call from Anil.
At the van, Peter asks if he upset Olivia. She remembers the restaurant and remembers him drawing a plan to find Etta. She felt responsible because she loved being a mother but it was at odds with the vision she always had of her future. She felt losing her was punishment for feeling conflicted about Etta. That day at the restaurant was when she decided to go back to New York because she didn't want to find out that Etta was dead. She feels horrible that Peter thought it was because of her strength and Etta just said she admired her.
Peter urges her not to overthink it and take the second chance they've been given to be a family.
Etta comes with news that the Observers are tracking them.
They check on Walter. Edwin is freaked out that the Observers are coming. Walter still needs copper to complete his suit. River suggests he barter with a nearby camp, but Edwin wants them to leave. River is disappointed by his dad.
Peter talks to Edwin, who is worried about dealing with the other camp of "bad people." Peter promises him the rocks in the mine are important.
Edwin radios the other camp, looking for copper.
Out on the road, the Observers approach. They find the Fringe team's tire tracks and follow them. Etta watches them approach.
Edwin talks to River about the differences between cowards and heroes. He knows he has a lot to lose. River hugs him and wishes him good luck.
Back in the lab, Astrid learns from Walter on tape that the mineral he's looking for is a crystallized form of quartz that can be used to create a powerful energy source. He'll explain more in tape 6. They need the energy source for the final phase of the plan. They need at least 40 pounds of the crystals.
Edwin reports that the other camp has 2 pounds of copper. But he decides he can't go. He gives them schematics for their solar technology to barter with. He gives Peter directions to the other camp. Peter and Olivia head off.
The pull into the place on Edwin's hand drawn map, but there's nothing there. They think he never wanted them to find it.
Back at Edwin's camp, he prepares to go into the mine unprotected. Walter and Etta come running when they hear a noise. Another member of Edwin's camp tells them there was no copper.
They find a bucket full of the red rocks they need waiting for them down in the mine. River comes and cries for his dad, realizing what he's done. Edwin sits, frozen in place, at the bottom of the mine. Someone in the camp urges the Fringe team to leave before the Observers find them.
River goes to the archives and leaves an entry for his father. "A hero died today, sacrificing himself in order to get the Fringe team resources they need in order to save our world. Edwin Massey, the recorder of history, made history."
Out on the road, the Fringe van runs smack into the Observers' blockade. The run to inspect the van, but the Fringe team isn't inside. It's stripped empty. The man behind the wheel insists he found the van on the side of the road.
Elsewhere, the Fringe team hot wires a car in a junk yard. Olivia holds onto her daughter, happy to have her back. They head back into the city.
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Late at night on the burned out streets, Peter covertly siphons gas from a car's tank.
He goes into a kind of pawn/curio shop and before he can say what he was looking for, an Observer hands him a necklace, saying it will look good on the young blond woman.
The Observer reads his thoughts as Peter focuses on the Red Sox. He hands over too much money and leaves the shop quickly. The Observer tells the others there is something wrong and to detain Peter.
He runs and gets away in a tunnel. He runs when a grenade-like device is thrown is his direction. It explodes and knocks him off his feet.
Peter wakes up lying on the ground with a young boy with a harmonica standing over him. He tells Peter that he came out of a storm drain.
Former Harvard UniversityWalter and Astrid carefully remove another Beta tape from the amber. He's annoyed at how slow the process is.Peter returns looking banged up. He tells Etta the Observer got an image of her from his head. The Observers always seem two steps ahead and Peter worries how they'll beat them. Etta plans to teach them all how to plan a labyrinth of random thoughts to slow the Observers mind reading down. He gives her the necklace to replace the one she gave up.
Captain Winmark plays with a Simon game in the shop, remembering the flashes easily. Broyles joins him. Winmark shows him the surveillance of Peter buying the necklace. He thinks the Resistance is getting information to the Fringe team. Two days ago someone on Broyles' team failed a security check, which has Winmark concerned, especially since Broyles is just now learning about it.
Back at Harvard, they watch Walter's tape 2, which is garbled. He shows plans, like blueprints, that outline the plans to defeat the Observers. He says he plans to hide them where he would his most prized possessions, then segues into a childhood story about "Manhattan Mystery Tours" his mother used to take him on, where they'd go to the station and hop on the first train that came.
The tape cuts out, but Walter knows where the tube is: in the wall of the subway station in Manhattan, which is blockaded by Observer checkpoints.
Walter decides he needs to get at a cabinet in the amber, to get under it. They laser through and he opens a door in the floor.
They head down to find Walter's cold storage of all the Fringe events they ever encountered, from creatures to gadgets. "There was a time when we solved Fringe cases, now I think it's time we created a few of our own," he says.
He never told anyone about it, not even Astrid.
Broyles watches a video feed of an Observer interrogating the guard who failed his security test. He got tripped up answering what the weather was like the day of his graduation from the academy. He cites his graduating class to the Observer, who probes his mind and accuses him of being in the Resistance.
He asks about Peter.
The guard resists the mind-reading until blood trickles from his nose. The Observer finds Anil, the Resistance fighter, in the guard's mind and also reference to "The Dove." Broyles pays close attention as the Observer asks what the Dove's real name is."I don't know, nobody does," the guard says.
Broyles arms his gun and waits for the Observer to report.
It's the third time they've heard the name "the Dove." He knows Anil mentioned a lab in sector B, he thinks Broyles knows it as Harvard. Captain Winmark knows Broyles "had a relationship" with the fugitives. Broyles says it was a long time ago.The Observer leaves and Broyles exhales and takes his hand off his gun.
Back at Harvard, Walter plays with his findings.
Olivia sees Etta restringing her bullet on the necklace chain. She found it in their old house, in Olivia's jewelry box and has been wearing it since she was 13. Peter used to call it "the bullet that saved the world."
Etta gets notice that the lab has been compromised from someone she trusts.
Broyles puts his phone in his pocket.
Etta tries to convince them to leave, but Walter is unwilling to leave the tapes containing the plan. They know if the Observers see they've been there, they'll never be able to get back in. Olivia suggests re-ambering the lab.
Broyles watches video with Captain Winmark of Loyalists busting into the lab and finding it empty and ambered.
Winmark can't believe the reading from the guard about the lab was deceptive. Etta hid her thoughts from them. He wonders if others have access to their readings.
Walter pulls up to an Observer check point to ask for directions. After scanning him, an Observer zaps him with a small taser. Walter quickly puts on a gas mask and sprays something in the faces of the Observer and guard, sealing their faces shut with scar tissue. He and Peter drive through the check point, but Walter is in the system with an apprehend alert.
Peter and Walter go down to the old subway station and Walter remembers where to look. They find the metal tube the plans are in. Olivia and Etta wait in the car up top and put on gas masks when they hear sirens.
Down in the station, Peter shoots the guards who respond. Etta and Olivia shoot canisters of the toxin that seals people's faces shut so they suffocate and guards drop like flies.
Peter and Walter shoot their way out of the station and, wearing masks, rejoin Etta and Olivia above. They get in the car and drive off.
Broyles sits alone in his office. He takes out a worn photo of Peter and Olivia.
Walter looks at the plans, which contain pages of dense physics equations that make no sense to him. Olivia wants to get back to the lab, but Etta says someone wants to see them.
Broyles pulls up. Olivia gives him a big hug. He asked Etta not to tell them in case they were read.
He met Etta for the first time at a crime scene five years ago and had her transferred into his section when he learned who she was. She recruited him into the Resistance and spent a year teaching him how to block his thoughts.
Captain Winmark gets the report of Walter and Peter's efforts. A guard shows him a device one of their men died holding. He thinks they'll be able to find the Fringe team.
Broyles gives his former team a small arsenal, including anti-matter batons with a 100 meter blast radius that can't be disarmed once they're activated.
They close the trunk and see an Observer standing there. Broyles stalls him long enough to shoot him. They see the tracking device on their car.
Broyles tells them to run. Etta gives him the plans and tells him to protect it at all costs. Broyles drives off as the team runs.Winmark and another Observer transport in.
The team runs and Winmark tracks them with teams of guards. They surround the Fringe team in a warehouse and cover every entrance. Obsevers transport in in front of them and the team shoots as they appear.
Etta and Walter get separated from Peter and Olivia, who run upstairs to double back for them.
As Peter and Olivia head for the roof, Etta is separated from Walter. She's looking for him when Winmark appears behind her and knocks her to the ground.
Peter and Olivia find Walter back inside hiding in a crate.
In another area, Winmark lifts Etta to her feet by her throat, choking her. He sees her bullet necklace and asks why Peter bought it for her.
She shuts her eyes and thinks random thoughts of blowing dandelions and her picnic with her parents as a child. Winmark reads "love" in her thoughts.As he puzzles over this, she takes out a dagger and tries to stab him, but he stops her. "You never know when to give up," he says. He steps back and there's the sound of a shot.
Olivia hears it and worries about Etta.Winmark watches as Etta slumps to the ground. He walks away. Peter and Olivia find her, she's shot through the stomach and mortally wounded. Peter tells her they'll move her, but she says she'll slow them down and they have to leave.
Peter looks in her hand to see she's armed an anti-matter baton and it's counting down. Etta hands Olivia the bullet necklace. Peter holds his daughter and cries as Walter says they have to go. The baton counts past 30 seconds.
Outside, Winmark says Peter and Olivia will go back for Etta because of love.
Winmark and other Observers go back inside and see Etta's body slumped against a wall. He sees the necklace is gone and then that the baton has 3 seconds left. He transports outside just in time to see the anti-matter device explode and erase the building.
Olivia holds onto the necklace from a distance as they watch the explosion. Walter gently tells Peter that she's gone and they have to leave.
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Peter goes through Etta's things as Olivia sleeps. He notices how much his late daughter looked like his wife. He finds a secret compartment that reveals a cache of weapons and explosives."That's my girl," he says as he arms up. Olivia wakes up. "Why would we get her back just to lose her again?"
Later, Olivia looks at a photo of Etta as a child with the woman who raised her.
ManhattanShivers of static electricity appear on buildings and in the street. Observers roll up with Loyalists and start to unload crates. One takes out a cube-shaped machine and turns it on. A portal opens and three large pallets slowly move through and appear in front of them, scorching the earth around them.
Back at Etta's, they prepare to leave. Walter wants to take her perfume to remember her by. Astrid calls from the lab to report she's run into a fire hazard, Walter left a propane tank in the way of the Beta cassette before they ambered the lab. It'll be a few days before she can get to the next cassette.
Anil calls Etta's phone, wanting to meet.
Anil meets Olivia, Walter and Peter at the scorched earth spot in Manhattan. They think it's from a wormhole from the future and the parts are to build the air degredation system. The Resistance wants to destroy the next shipment when it comes, but they can't read the Observer's language.Anil gives Olivia a book with characters in it and shows her video of the Observer they captured and took it from. They have the cube.Peter wants to try to use the cube to destroy the entire wormhole. Walter thinks it's too risky.
"Before you go on a journey of revenge, dig two graves," Anil warns Peter. But Peter's not worried about himself, he just wants to defeat the Observers.
Later, Peter works on the cube but it zaps him as he takes it apart. Back at the lab, Astrid puts the Observer's notebook through a decryption program. Olivia is trying to keep distracted from thinking about Etta.Astrid realizes each of their symbols could stand for more than one thing, she wants to run multiple decryption programs at once and needs more computing power.
Walter checks on Peter, who reports the cube is packing a ton of power. Walter thinks he knows how to destroy the shipping corridor, but it's very dangerous.Walter shows Peter a model of the future to explain his idea to turn the wormhole into a blackhole that is closed on their end and will back up in the future.They'd have to throw in an anti-matter baton, but they'd have to get to the wormhole with the cube before the Observers. Peter wants to force the Observer to help them.
As Peter packs up, Olivia tries to get Peter to slow down, reminding him they also have Walter's plan. "But what do we have? Pieces we don't know how to put together, a scroll with physics we can't decipher, a thought unifer that doesn't work and a box of rocks from a mine. That's what our daughter died for so far," Peter says.
Olivia tells him she's afraid, but he assures her he can do this. He wants everyone to know Etta helped save the world. Walter listens to their conversation.Peter leaves the lab and joins Anil with the unconscious Observer. Anil explains the Observer's abilities are aided by tech.He wakes the Observer up and leaves him with Peter.
Peter takes out the cube, explaining to the Observer that he's going to help him figure out how to use it. The Observer doesn't understand why Peter would think can get him to cooperate when the others couldn't. "You don't even know what you don't know," the Observer says."We'll see," says Peter.
Peter sets a tiny camera up very close to the Observer's eye and studies his micro reactions as he picks up pieces of the cube and puts them together.The Observer compares humans to ants. "You think the black over your head is dark skies, but it is really our shoe," he says.Peter continues putting the cube together, the pieces fitting perfectly in the right order.
Walter comes to Olivia in the lab with tape of one of Etta's birthdays. "It will be incredibly difficult for you to watch, but I believe it's important for you and Peter to see it," he says.Walter tells her what he overheard and knows she meant she was afraid for her relationship with Peter. Walter tells them they have to face their pain together."I have experience with this kind of pain, and you can't escape it by building walls around your heart. Or by breaking the universe, or by vengeance," Walter says. "You lost each other once, but you have another chance."Olivia refuses to watch the tape.
Astrid announces they decoded the book, it is a shipping manifest and the next shipment is this afternoon.
Back with the Observer, Peter knows if he attaches the next piece incorrectly, they'll be obliterated. He watches the Observer's reactions as he holds it over the four placement options. Although the Observer says he doesn't care if he dies, Peter says he still has human-based subconscious reactions that he can't control.He watches the Observer's pupils as they expand and contract and puts the piece in the right place. He continues. Olivia calls to tell him where the corridor will be opening. Peter puts the last piece in the cube and it turns on.
At the location, static electricity is already appearing and Observers are setting up a cube. Anil sets theirs up in the road. Peter aims the anti-matter baton from building.The Observers notice the corridor open across the street from them and realize something is wrong.
Before Peter can fire from his perch, and Observer appears behind him and kicks him across the room. He kicks Olivia over as she takes aim. The Observer stands over Peter and raises his shoe over him, about the crush the ant.But Olivia stands up behind him with the gun and shoots the Observer.
Peter aims the anti-matter baton into the corridor and hits it. It closes, its contents being sucked back in.They get in the van and are driving off in a celebratory mood when Anil checks the review mirror. They stop and look down the street. Another shipment is arriving through another corridor.
Peter calls Walter for an explanation, but he's stumped. Peter stalks off "to get answers."Olivia looks at the alley where she's standing and sees signs with Etta's face on them saying "Resist."
Peter charges in on the captive Observer and holds plastic over his face.When he asks why it didn't work, the Observer again tells him he doesn't even know what he doesn't know. And that Anil was right about digging two graves before a journey of revenge.
The Observer explains he was watching a fly on the wall and that made his pupil dilate. "You ascribed meaning to something that was not there," he says. He says Peter put the device together from his experience as an engineer and just needed his reactions to build confidence.Whether they caused Etta's death is irrelevant, the Observer says, because she was here and now she is not. "You are nothing but tech, I would be ten times what you are if I had that tech in my head," Peter says, before he knocks the Observer out.
Back in the lab, Olivia contemplates the birthday tape. She puts it in.
Meanwhile, Peter picks up surgical tools and slices the Observer's neck open, comparing the pain to the pain a father feels when he loses a child. Peter removes a small processor as the Observer dies.
Olivia watches the tape of her with Peter and very young Etta. They're all very happy.
Peter slices into the back of his neck and inserts the processor, which leaps to his skin and climbs up to his brain, giving him the mother of all headaches. Olivia calls in tears as the tape plays, asking him to come home. "Etta would want us to be together, she would want us to survive this. I love you," she says.
Peter says he loves her but has to get off the phone as something strong comes over him.
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Walter works to unearth more objects from his ambered-over lab. He pulls out a Betamax cassette and enjoys a red vine.It's tape seven, Walter is walking and talking as he films, saying he'll show the viewer how to get the next piece of the plan.At Etta's, Peter watches a hologram message from her. He grabs his gun when he hears a noise, but it's just Olivia. She came looking for him after he didn't come home and wasn't answering his phone. She sees the hologram of Etta. She understands why he came. They watch the recording together as she snuggles into him."Peter, when you feel like this, I just want you to include me," she tells him. He kisses her and she caresses his neck and feels the wound there. She asks about it and he says it's a scratch. (It's where he inserted the Observer tech.)On the tape, Walter reaches 167 Cedar Street, apartment 413. A woman confronts Walter on the tape for being a nuisance in the building.Walter goes to Boston and is spotted on the street by a surveillance camera. Chunks of the building are missing, blown out. The same woman is on the ground floor with a motorized eye. She tells him the fourth floor has been "red tagged" for years.He starts up the stairs, which are next to a gaping hole in the wall. He enters 413, which is split like a mirror image of itself down the middle. He takes the prescribed number of steps forward, back and to the side, then turns around and steps cleanly through to a parallel universe.On the other side, he comes out in what looks like a totally different apartment building, with hallways designed by MC Escher.Back at Harvard, Astrid, Peter and Olivia find Walter gone. They watch the tape, which explains a "unique and efficient hiding place for a piece of the plan to defeat the Observers." It's a parallel "pocket" universe, where many of the usual laws of psychics don't apply. They see him reach 413 and meet a man named Donald, who isn't shown. Walter promises everything will be clear "once we're safely inside."He explains the steps and pivots that we just saw him perform, but it cuts short and the tape goes black. They don't understand why he'd go alone. "It's not like him," Peter says.On the other side, Walter wanders through unfamiliar hallways, including one that takes a 90 degree drop straight down.As he walks he turns around and sees someone behind him. He hides, but the person walks away, then appears right next to him with a knife on him. Walter asks if he's Donald, but he's Cecil. The man wants to know how to get out of there. He was in one of the apartments and there was a light bomb explosion thrown by the resistance and he woke up there. Walter explains that the blast pushed him through.Cecil found water and Walter demands he show him.Astrid, Peter and Olivia reach the building.Inside, upside down walking on the ceiling, Cecil shows Walter a drip he's been gathering water from. Walter thinks there's something behind the wall causing the condensation. Cecil says he's checked and there's nothing there, but Walter wants to look.Cecil thought he was in purgatory because he was stealing something when the blast happened. The apartment wasn't bombed out before he was there. Cecil thinks it's 2016. It's 2036. Walter explains the pocket universe.On the other side, they reach the apartment. Peter tries retracing the steps and turns, watching the tape. Olivia joins him and they step through to the other side. Peter notices the tape, which was black in the lab, is still playing. Walter narrates where to go in the pocket universe. They follow his directions.Back on the other side, Captain Winmark gets word that Walter Bishop has been sighted.Following Walter's directions, they reach the dead end that isn't a dead end and keep walking. They realize Walter is talking to one other person besides Donald on the tape.They hear a noise and see Walter down the hall. Peter reminds him he's not supposed to leave the lab. Walter gets angry, saying he was just focused on finding the next piece of the plan. Walter briefs them on Cecil. Walter assures someone on the tape that they'll be safe and comfortable and only staying there for a short time. They see a young bald boy. Olivia and Peter remind Walter that he was from a case they worked and he had empathic abilities. ("Inner Child", episode 15, season 1.)They go looking for the door with an apple on it (the symbols, like the sea horse and six fingered hand, are from the old opening credits). They find it and the hidden key.There's a made bed inside, but no boy.On the tape, Walter explains to the boy that the room was designed just for him and he has to stay put and wait for them to come back for him. On tape Walter finishes by saying: "To understand his purpose, refer to tape 8."There's a portable air degradation unit in the room, they think he was an Observer. Walter is angry that another part of the plan is missing. He rages that everything they've done is for nothing. Peter goes to talk to him.On the other side, Astrid sees Observers and Loyalists pulling up outside, including Captain Winmark. They start going door-to-door.Peter explains to Walter that Donald was the only other person who knew the pocket existed. But they don't know why he would have moved the boy. They have to find Donald. Olivia shows them a radio from the night table that isn't on the tape. It isn't working, but she suggests it might on the other side. They're ready to go.Astrid watches from the window as the search begins. She turns around only to come face to face with an Observer, who knocks her out. Another appears and they easily pass through to the other universe. They shoot Cecil. Peter leads Olivia and Walter back, easily and confidently retracing their steps to 413. Peter shoves Walter through and shows Olivia where to cross, but after they're gone and before she can follow, an Observer grabs her around the neck.She tries her gun, but it doesn't work on that side. She grabs him and yanks him through while firing. They appear on the other side and shoot their way past Observers into the alley. Peter tells Olivia to take everyone else and he'll fight the Observers off. She runs off and an Observer rounds the corner and fires at Peter, knocking him to his feet with a kind of sonic blast. The Observer teleports next to Peter, but he's able to anticipate his moves as they fight. Peter shoves the Observer easily against a wall and draws blood."I know what you have done. You have made a grave mistake. You do not realize what is happening to you," the Observer tells him.In response, Peter teleports behind the Observer and easily snaps his neck. He picks up the Observer's gun and teleports away. Captain Winmark sees him and almost seems pleased.On the monorail, Olivia gets nervous but Peter joins them. She asks how he found his way out of the portal."I don't know, but I'll take it," he says.Olivia turns on the radio, which has been jammed to one frequency. Nothing is being transmitted."Not yet," Olivia says.Walter can't stop thinking about Cecil and how he failed him, he was more focused on saving the world. "Walter, you are not responsible for that man's death. He died 20 years ago in that apartment when the light bomb went off. If it wasn't for your 'pocket' he would have died right there," Peter says."Perhaps. I saw a man half-starved and I used him because it suited me. He was nothing more than an acceptable loss as long as I got what I needed. Is that who I am, Peter? Is that something you can see coming from my mind, my heart?" Walter says.The hubris of leaving the lab in the middle of the night on his own is "him," Walter says."I'm not safe. It's my mind. Ever since the pieces of my brain were reimplanted it's been changing me back into the man I was before. Bit by bit, I'm losing myself Peter. I'm losing the man that you helped me become.""Listen to me, I'm not going to let that happen. We need you. You are our only hope to defeat the Observers and I'm going to be here with you every step of the way," Peter says."Please son, whatever happens, don't let me go.""I won't, Dad. I promise."Peter looks up at the monorail car and sees it in the same blue grid an Observer would.
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Peter tries out his fancy new Observer technology. He can see and hear from far away and watches as a carful of Observers picks up Mueller for a meeting.Peter steps out into traffic in front of a red light, stone-faced like an Observer. Then he walks to the curb and waits. The scene he has witnessed plays out. Mueller walks out of a building and bumps into the same woman. But he is not picked up by the same car of Observers and keeps walking. Peter calls Anil for help.Peter returns to Walter in the lab with the fuel for the laser. Olivia is concerned that Peter didn't sleep, again, and left in the morning without her.They're interrupted when they hear loyalist guards pull up outside the lab. They get out and look around, but then get back in the car and leave.Astrid frees tape five from the amber. Walter shows the viewer drawings for a beacon (the metal egg-shaped thing with grooves in it) that the Observers use to locate points in time. He says they need two and can find them at Kelvin Genetics, a lab Walter and William Bell designed. Walter explains William was keeping two in his storage facility and they need his handprint to unlock it.That's why William was in the amber with them and why Walter took his hand when they were freed. But, Astrid says, that's not the only reason. Before the invasion, William came to Walter and said he wanted to help, but then he betrayed them to the Observers. Walter remembers that and also being tortured by a man with an accent who kept asking if something was safe. But Astrid points out he's remembering "Marathon Man."Instead, Peter remembers Walter called him in Boston to implement the plan. He sent Olivia to Grand Central to collect the thought unifier. But the time Peter reached Walter and Astrid they were with William Bell, but the Observers found them and they realized they William was the only one who could have told the Observers where to find them. That's when Walter ambered everyone.They don't have a way of knowing if William was telling the truth about having the cylinders, but they want to find out.They go to the burned out shell of the warehouse. Using Observer Vision, Peter can see the door when no one else can. Olivia notices Peter is bleeding from his ear.Walter examines his ear, but Peter says he's fine.They try to figure out how to get through the rubble which is blocking the entrance.Anil calls Peter, saying the plan didn't work. Peter expected an Observer to forget his briefcase in a park, but he never did so Anil couldn't make the switch for the one Peter gave him. Peter is incredulous and says he's on his way.Walter wants to reach out to Nina Sharp with the Minister of Science for help getting through the rubble. Peter tells Olivia he's going to go meet with Anil, but says Anil wouldn't say what it was about. Olivia worries about him.Nina Sharp gets a message and goes to meet Olivia, Astrid and Walter. She heard about Etta, who she was close to, through Broyles, and offers condolences.They explain the rubble they need to move. She suggests Observer tech for sublimation, converting solid matter into gas. The rubble would essentially evaporate.Later, she meets up with Walter and tells him she told Etta and Simon how to reimplant the portion of his brain he had removed. He tells her Peter is going to help him make sure he doesn't turn into the man he used to be. Nina tells a lab tech named Hastings to give Walter anything he wants.In the park, Anil recounts everyone who was near Royce the Observer. Peter says there was supposed to be a little girl with a ball who distracted him, but Anil says Royce was talking on his comm and didn't see her. Peter realizes the comm was the variable he didn't account for. He mentally reviews Royce's path, including checking his briefcase at a restaurant. He takes the briefcase to make the switch himself.He gives Anil the address of an Observer precinct, saying at 6:17 Royce and Mueller will walk into the building. He tells Anil to call him when they do. Peter is sounding more and more like an Observer, cold and calculating.He gets in a car to hotwire it and gets a splitting head ache and sees a blinding light. He shakes for a moment, but the feeling passes.Peter goes to the restaurant and checks his briefcase. He takes a seat at the bar and waits.Waiting for Walter, Astrid asks Olivia about Peter. He doesn't sleep and leaves the lab at odd hours. Olivia thinks there's something he's not telling her. She's worried she's losing him again.At the bar, Peter watches Royce check his briefcase and sit down for lunch. He checks his watch and then approaches the coat check as the hostess is getting an annoying phone call from her boyfriend. As she's distracted, he points to Royce's briefcase as if it's his and walks out with it.Back with Walter, Hastings explains the tech he's lending them.Nina tells Walter she's worried about him. She tried to hold on to William but lost him to the pull of unlimited power. Walter coldly tells her William never loved her because he never loved anyone but himself. For a moment, he reminds her of old Walter.Walter again insists that Peter will be enough to save him.Nina wishes them luck and warns them the Observers monitor changes in the atmosphere so they'll be on them shortly after they use the sublimation device.At 6:17 p.m., Anil watches as Mueller and Royce arrive and enter the building.They go into a conference room and Royce opens his briefcase. Anil looks up to see the explosion. Their faces essentially fall off in pieces.Back at the collapsed building, Olivia and Astrid set up the device. Peter drives up and takes a call from Anil saying it worked.Peter tells Olivia that he waited for Anil for an hour, but he never showed.Walter activates the device and they watch as the pieces of rubble crumble and disappear. They go inside and downstairs to the storage facility. They power the electronic lock back up and scan William's severed hand. The door opens.There are specimen jars and experiments everywhere and, to Walter's horror, his old David Bowie record. Peter finds a wall safe. Walter says he knows the combination but then struggles to remember it.As Astrid and Olivia get antsy, Peter lays a soothing hand on Walter's shoulder and tells him to take all the time he needs. He tries again with five-twenty-ten and it opens.The safe is empty except for a small device the size of a hockey puck. There are also some files and an old photo of Nina. Walter takes the photo.Peter activates the small device and it glows red and the floor starts rumbling. The beacons drive up through the floor.On the way out, Olivia warns Peter to wait because they don't know what's out there. But he keeps walking, never stopping. He says he'll take his car because it's "logical."Olivia can tell something is seriously off with him.Walter asks to make a stop on the way home. He goes to see Nina and tells her everything worked. He gives her the photo of her that was in William's safe. "I was wrong, he did love you. And it wasn't enough," he says."I'm scared, Nina. Every day that goes by I feel 'him' more and more," he says. He asks her to take the pieces of his brain out again.Olivia arrives home to sees Peter's surveillance work, timelines of the Observers' activities. He explains Royce and Meuller were Windmark's top lieutenants."The tech that gave them their advantage over us. I have it now," he says."That thing in their heads? You implanted one in yourself?"Peter nods, and says he's been following them. He says he's been following them to predict their futures and was able to alter their paths just enough to get them in the same place at the same time. He used the flesh eating toxin from flight 672 from Walter's cold storage. "Our first Fringe experience was their last," he says."That's why you knew they wouldn't be coming for us at the storage site. You know they would still be responding to your attack," she says.He says her next few sentences as she does. "You can't do this. This is dangerous.""We're going to avenge Etta. Windmark's next," he says.Olivia is totally and completely freaked out as Peter is in full Observer calculation mode.Back at the lab, Walter looks over the pieces of his plan they've collected. The rock, the thought unifier, the radio from the pocket universe, the beacons. The turns the radio on and puts on his David Bowie. He listens to "The Man Who Sold the World."Peter continues cataloging his observations of the Observers, including Windmark taking the elevator. He ignores the pain in his head, but rubs it and comes away with a handful of hair.
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Olivia waits in a car and notices workers peeling down the "Resist" pictures of Etta. Anil joins her. He brings her a piece of the same tech Peter implanted in himself for Walter to study. He gives her more ammo and offers whatever help she needs.Peter the almost-Observer makes notes on his board at the apartment, following timelines. Windmark and another Observer step out of thin air into the hallway and walk to the apartment. Peter doesn't appear to be inside, but they inspect his timeline foretelling Windmark's movements. Peter has gained the ability to "run futures."The timeline ends at 5:42 "You Are Here."The clock reads 5:42p.Peter waits across the street.Formerly Harvard UniversityAstrid and Walter watch tape 8, directing them to a scrap yard in Fitchburg. Tape Walter tells them to get an industrial-sized magnet, the kind used in auto-junking.Olivia joins them. She tells them what Peter did and what he can do.Walter needs to see how the tech interacts with a brain. He has a brain preserved in formaldehyde.Peter calls from New York to warn them Etta's apartment has been compromised. He ignores Walter's pleas to come back to the lab."Trust me when I tell you, I am in complete control," Peter says impassively.Walter reminds Peter of the promise he made to keep him in check.Olivia needs something to do and decides to go after the magnet alone.In New York, Peter sees Windmark passing a café before it happens. Peter walks past, taking a cup of tea and placing it on the edge of a garbage can that Windmark will pass.A man's bag knocks it onto Windmark's shoes and the man stops to mop it up. Windmark is stopped at the light at a crosswalk.Peter checks his watch.Olivia drives to the scrap yard and sees a little girl running around. She talks to Carlos, telling him she would like to barter for a magnet. He's surprised and tells her to wait.Inside, Carlos tells Simone (Jill Scott) that a woman outside is asking for a magnet. Simone recognizes Olivia."Send them now," she tells Carlos.Outside, Olivia starts to get nervous as the people in the scrap yard eye her. Simone introduces herself, they've been expecting Olivia."I've been waiting many years for someone to come for that magnet," Simone says.Inside, she shows Olivia a truck she says has belonged to Olivia for 21 years. Simone mentions a man coming to talk to her mother and saying he had a way to save the world. Before she died, she made Simone promise to hang onto the magnet. Simone sent for diesel fuel. She knows Olivia doesn't mind waiting.She sees things about people, like that Olivia has a bullet in her pocket.In the lab, Walter is not optimistic about the odds of the preserved brain working. He's not sure how to attach the tech, but it flies out of his hands and into the brain stem. They see a lot of activity along the cerebral cortex, which controls higher reasoning. Extrapolating the data, they see that the cerebral cortex becomes so thick it overrides the area used to control emotions."It's worse than I feared," Walter says.Simone worries about the lateness of the people she sent for diesel.Olivia talks to the little girl, Darby. The other people said Olivia was on Reward Wire, there's a bounty on her. Simone brings her water and Olivia is suspicious.She sees other people approaching her and pulls her gun on Simone. Simone takes a sip of the water and tells Olivia she has no faith.Simone tells Olivia she's free to leave in her car anytime.Simone knows Olivia lost her daughter -- twice.Someone signals the fuel has arrived.In NYC, Peter anticipates Windmark, watching from a warehouse. Suddenly Windmark appears behind Peter. He knows Peter has been making adjustments and he has been making his own.He says he knows Peter made him miss the light at the crosswalk. "Everything has taken place as I intended," Windmark says.Peter phases in and out, attacking Windmark. Windmark gains the upper hand but Peter phases out and ends up behind him, pummeling him. Windmark slips free again, grabbing Peter's head and taunting him about Etta dying."Your emotions make you weak," Windmark says.He pulls a knife on Peter, but Peter gets free. He anticipates the appearance of the other Observer behind him and blocks his knife attack,deflecting the stab so it hits his shoulder. Then Peter phases out so he's behind the Observer and he stabs him.Windmark is left alone.He phases out onto the street and looks around.Peter and his split open forehead walk away.Back at the junk yard, Simone tries to encourage Olivia not to lose hope. Olivia tells Simone her gift is an anomaly, just like her telekinesis is an anomaly. Olivia knows too much to have faith. "It's all just numbers and the invaders are just better at math than we are," Olivia says.She gets in the truck with the magnet and leaves.Back in the lab, Peter appears with a split head and a shoulder wound. He's not in any pain.As Walter stitches him up, he tells Peter the technology is reshaping his brain.Peter knows what's going on but says there's nothing to be afraid of, given the potential he's tapping into.Walter warns him that before long, he won't be able to reverse it.Peter plans to shift Windmark's future so that he passes through the square at 7:19 p.m., resetting him on the correct path to avenge Etta.Walter says the plan on the tapes is the way to fight. Peter says he has to go.Olivia drives the magnet back to the city. She calls Anil for a place to store it but runs into two burned out cars blocking her path on the back roads.She stops and gets out to inspect a woman lying in the road. She gets close enough to see it's a doll. It's a trap.Two men disarm and scan her, identifying her as a fugitive. She tries to fight back, but they knock her out.Olivia comes to in captivity in a garage warehouse and hears the two men deciding what to do with her. One of them calls Reward Wire and asks to meet at a Truth Church where the Observers can't scan him. He gives them Olivia's name. Olivia looks for a way to get free and saws her ropes on a giant drill bit.A loyalist reports the call about Olivia to Windmark, who agrees to the terms. Olivia's captor makes plans to meet them in an hour.In the other room, Olivia breaks through her bonds. She's surrounded by heavy machinery and cranks open the pressure valve on one.Back in NYC, Peter snips the wiring on a fuse box for the elevator.Windmark pushes the button for an elevator, but it does not come. He takes the stairs.Olivia goes the full MacGyver, pouring gas on a rag, hooking a hose to the compressor and taking her bullet off her necklace. She puts it in the pipe and lights the rag.Her captor goes into the other room when he sees smoke. She flips the switch on the pressure gauge and it shoots the bullet slug through the pipe and into the man's forehead.The other captor goes to see what's happening but Olivia gets behind him with a gun. When he goes for his gun, she shoots him dead. Olivia stops to get the bullet slug out of the door.Olivia takes Walter's call, but tells him she's fine. He tells her Peter was there, but left, even after Walter told him his brain was being altered.Olivia asks where he is.Peter watches a square at night in the rain. Olivia joins him. He tells her that in a few minutes Windmark will pass the fountain and be back on the trajectory that leads to his death.At 5:12 tomorrow afternoon, Peter will meet him face to face and at 5:13 Peter will snap his neck and at 5:14p he will take his last breath.Peter tells Olivia that Windmark showed him Etta's last thoughts -- they were of them that day in the park.He doesn't want to remove the tech until tomorrow.Olivia tells him Etta is alive inside of them and her bullet saved her life today."Emotion is our weakness," Peter says."No, Peter it's our strength, because it's the one thing they do not have," Olivia says.As Olivia pleads with him to hold onto Etta, he watches Windmark pass the fountain."I'm not going to lose you again," Olivia tells him. She says she loves him and a million scenes of their life together pass before his eyes.He takes out a knife and digs into his neck. He grabs ahold of the tech and yanks it out. Olivia takes it and gives him Etta's bullet.
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Formerly Harvard UniversityIn the middle of the night, Astrid wakes up to something emitting beeps. She goes to investigate and finds it's the radio they found in the pocket universe. Walter lurks in the darkness. He tells Astrid her hair is beautiful. This is only slightly more weird than the fact that he calls her Astrid. Peter lies awake in the middle of the night, unable to sleep. His tossing and turning wakes up Olivia. He has had another bad head ache. Astrid comes to show them the radio. It's on a loop, but it's not Morse code. Olivia tries to consult Walter, but Astrid explains that he's useless: he dropped acid. He sees a tiny green Tinkerbell flitting around Peter's face and sees a blonde woman over a soundtrack of opera. He's tripping. He says his old nemesis, the one who was burned in the fire, is haunting him. It's Dr. Warren, the lab assistant whose death put him in the mental institution years ago. All Walter can say about the message is that the beeps are in A minor. He tells Peter that Nina promised to remove the pieces of brain they put back in after the Observers are defeated. He's worried about losing them, but Peter doesn't like the plan. Walter says they're running out of time. Two months ago he was dressed and ready to go outside at 3 a.m., but doesn't know where he was going. Walter's hallucination of Warren says "he" knows where he was going -- the Walter that was. He figures there must be something left of that Walter that he can use. Olivia suggests they try tracking the signal. Peter decides to contact Anil for help. Alone in his darkened office, Walter sees his tiny Tinkerbell bring him a match, which he uses to light a candle. He turns on the TV and sees Anil explaining how a machine will track the signal, a scene that's playing out behind him in the lab. Warren tells him there's something hidden in the lab. Anil tries his machine and they get a location. Zoom in on a location in the woods somewhere, a skeleton hand holds a gun. Willington, Conn.The team drives into the woods. On foot, Peter admits he's embarrassed he left Olivia again -- the very thing he promised he wouldn't do. "I'm just so incredibly lucky to have you," he says. They see an RV nearby and find the skeleton of an Observer. There are two more skeletons, another Observer and a Loyalist. Olivia guesses they were killed 10 or 15 years ago. Peter looks in the RV and thinks they found Donald -- another skeleton. There's an early prototype Observer gun nearby. He killed the others but died before he could drive away. Peter follows the location of the signal, and the cable that leads to it, all the way up a tree. In the RV, Olivia looks through the victim's wallet. The cable isn't the source of the transmission, it's just a relay being used to bounce the signal from somewhere else. Olivia tells Peter the body in the van is not Donald. It's Sam Weiss, Olivia's old guide to her powers who "worked" at a bowling alley. She calls Astrid, but Walter doesn't remember Sam. Back in the lab, Warren vaguely directs him to find his "secrets." Then he sees Nina. Warren tells him the other Walter would go work with the Observers, if only to show off. But Walter refuses to leave the lab. He goes to his office, Warren says he's "warmer." He lifts up a panel in the floor. Warren says it's his life's work, "the work that I came to burn the night that I died." HalluciNina tells Walter to put it back. Green Tinkerbell scolds him, but he flicks her away.He opens the book, it's his old journal. Cut to Walter in a cab with the book. He flips through his inventions.He asks Warren what "black umbrella" is and why it's in his head. A butler opens the cab door and offers him more acid, which he takes. He insists to Warren that he's not who she says he is. He realizes he's in Manhattan, outside the Observer precinct. Warren says she's there as a representation of the true him. Walter realizes he has to find his way home. But then Astrid opens the door and Walter gets out at the shore. They meet Peter and Olivia to rent a boat. They have traced the signal's origin to a nearby island, which looks like Oz to Walter. As they're heading down the dock to the boat a boat full of Loyalists pulls up and tells them to wait. Peter says they're going to meet his uncle, but when he reaches for his papers, he grabs his gun and shoots the man instead. Olivia takes out a few others and they run for the boat. They pull away from the dock, leaving the bodies of half a dozen Loyalists behind. On Thimble Island, Hallicination Warren is still following Walter. The signal originates from inside a house. Before they can investigate, a middle aged man comes out with a rifle. They say they're looking for Donald, but he says he doesn't know him. He doesn't recognize Walter. The child Observer comes out, and a woman named Caroline. Olivia explains why they're there. "Richard, we knew this could happen, that one day someone would come for him," Caroline says. Richard asks what the transmission said. Astrid tries to explain they couldn't crack it, but Richard demands the password. Suddenly Walter is in an old Monty Python-style cartoon, flying across fields and into a factory with a frog and a seahorse and a Scottie dog. He follows his Tinkerbell to a knight, who turns out to be the other Walter. The frog eats him. He uses a giant key to open a tree trunk and get a black umbrella. "It's black umbrella," Walter says, out of his dreamland. Richard lowers his gun. Tinkerbell congratulates Walter. Inside, Richard explains he and Caroline, his wife, helped the Resistance in the early days. Donald showed up eight months after the invasion and left the boy with them. Donald said he'd worked with a scientist from Boston. They never saw Donald again. They heard he was dead.Before he left, Donald gave them the transmitter to turn on every five days to broadcast. The boy has lived with them 20 years and hasn't aged a day. He doesn't speak. They call him Michael. Later, Richard and Caroline say good-bye to Michael and he goes with the Fringe team. Back at the lab that night, Olivia brings Michael cocoa like she used to make for Etta. Olivia asks him if he remembers her. He nods, even though he met them in a different timeline. Walter sees scenes from decades ago, telling Elizabeth he won't give up until he finds a cure for Peter. Warren questions his plan to create a wormhole to another universe. He remembers going through. She says there has to be a line somewhere. Warren quotes Oppenheimer to him to warn him that the portal will destroy both universes. "Somethings are not ours to tamper with, some things are God's," she says, quoting William Bell from season 4."There's only one god in this lab and it's not yours," Walter tells her. Walter breaks his reverie and burns his journal. Warren tells him it doesn't matter, now that he remembers everything he's capable of. HalluciNina tells Walter that with the boy back, they have to keep fighting."You've been him longer than you've been you," Warren says again.
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In the lab, Peter scans Michael, the child Observer. He doesn't have Observer tech in him. Olivia tries to find a way to communicate with him. Walter suggests going into his mind like they did with September, even though it involves putting him in a coma and on LSD.Walter gets pushy, demanding answers. "We've got a world to save!" he says. Olivia doesn't understand why she doesn't have the empathic connection she had with him before in the other timeline. Ministry of ScienceOlivia calls Nina for help. Her secretary eavesdrops outsider her office, so Nina says she'll call back. Windmark and two other Observers come into her office a bit later. Windmark asks her Loyalist secretary where Nina is. She took an early lunch, but the secretary says she's always back by 1 p.m.He calls for an LQ 7 unit. They traced the sublimation device back to the Ministry of Science. Observers hook up a machine with electrodes on the office glass doors. They run a scan and pick up traces of Nina's conversation. Nina meets with Olivia on a busy street. Peter and Walter are nearby with the boy. She has tech that she thinks will be helpful in communicating with him, in a Massive Dynamic "black" lab that she let the Resistance use. Nina asks Peter about Walter. Peter admits he's changing. Peter doesn't like the idea of removing the pieces of Walter's brain again, but Nina points out if the plan isn't completed in time, Walter may be too far regressed for the procedure.Oliva sees a "Resist" poster of Etta. Back at Nina's office, Windmark waits as 1 p.m. approaches. He wants to see where the sublimation device was taken from. Meanwhile, Nina leads the team to a lab via a secret entrance. The lab is cold and industrial with chemicals in tanks and bright lights and glass chambers with Observers in them. The Resistance experimented on Observers there, but didn't learn much about how they read minds. She thinks the neural stimulation might work on Michael. She shows them an electro-cognitive-translator, or ECOG. Walter calls for "the subject," and Peter reminds him his name is Michael. At the Ministry facility, Windmark prepares to interrogate a lab worker. He says they've determined Nina is a traitor working for the Resistance. He says he knows nothing about it. Windmark believes him. Peter puts the ECOG sensor on Michael's head. Olivia assures him it won't hurt. Walter and Nina monitor the readings. Olivia asks if he remembers why he's so important to Walter's plan. The software can't interpret his thoughts."Something has fundamentally changed with the subject- Michael. Whatever allowed us to communicate before is no longer viable," Walter says. Nina thinks he can't understand what they want. "We've been trying to get into his mind, maybe the answer is letting him get into one of ours," she says. Nina has to reconfigure the software, but she says they'll need another ECOG device from the lab. She says they can get one from Hastings. Meanwhile, at the lab, the Observers go down the line of employees interrogating them. It's almost Hasting's turn. His phone rings, but he ignores it. Walter, Peter and Olivia pull up outside the lab, but need the passcode to get in. They can't reach Nina underground. Inside, it's Hasting's turn with Windmark. Outside via comm, Astrid walks Peter through bypassing security. The door opens. Windmark asks Hastings about the sublimation device, and doesn't believe Hasting's answer. Peter, Olivia and Walter access the warehouse storage but have to look up the ECOG to find it among all the pallets. Olivia climbs to the top of the shelves to pull down the ECOG and when she removes the bin she has a clear view up into the office where Windmark is interrogating Hastings. He's cracking under the strain, but doesn't know where the fugitives are. Olivia watches from across the warehouse, helpless. Nina goes upstairs to make a call. As soon as she's outside the lab the Observers pick up her comm signal. Olivia watches as the Observers leave Hastings alone. They rescue him and he tells them they tracked Nina. Olivia calls her and tells her she's been compromised. Nina says it's OK, then smashes her phone. Back down in the secret lab, Nina returns to Michael but is clearly shaken. She tells him there's nothing for him to worry about. He places his hand on her face and she sees something. Then they watch on the security camera as Windmark and a car full of Observers pull up outside. She turns off the security cameras and hides him. Peter, Water and Olivia race to get back to the lab, but get stopped at a checkpoint. They can't turn around, so they take turns getting out of the car, first Walter then Olivia, each carrying cases with ECOGs in them. Peter gets out and follows them down to a parking garage, where he hot wires a minivan. Loyalists pull up outside the secret lab. Windmark teleports down into it followed by Observers and Loyalists. Nina is waiting for him. She has turned the security cameras back on again. She faces down Windmark and tells him the fugitives are gone. She tries to block her thoughts from him and he tells her it will not last. As the Observers search the lab, Windmark goes to a covered container and pulls a sheet off. He sees the Observers that were experimented on, and calls her and the resistance "animals". He sits down and starts trying to pry into Nina's brain. She's thinking of Michael. Windmark gets that Michael is important to the fugitives. Windmark corrects Nina, telling her that Michael is not a child. He's a chromosomal anomaly, designated XB-6783746. He was scheduled to be destroyed, like all other anomalies, but he went missing. An Observer reports that there is no one else in the lab. Windmark says he'll resort to a deep extraction method. He's intrigued when Nina isn't afraid. She compares his listening head tilt to a lizard, with whom Observers also share lack of emotion, and then tells him the experiments they conducted in the lab revealed that Observers inadvertently honed primitive instincts that humans moved beyond long ago. Humans are more advanced and the Observers are the "animals". "Restrain her," Windmark orders.As the loyalist is handcuffing her to her wheelchair, she grabs his gun. "You cannot hurt me with that," Windmark tells her."I know," she says, as she turns the gun on herself and shoots herself in the head. Peter, Olivia and Walter arrive at the lab and head down. It's been ransacked, but it appears empty. They see Nina slumped over dead in her chair. Walter rushes to take her hand and cries while Olivia covers her. Walter thinks they have Michael and worries what they'll do to him. Peter notices the surveillance cameras and pulls up the footage. They see Michael place his hand on Nina's face and then leave with her to hide. Next they watch her confront the Observers then shoot herself.They realize she did it to protect them -- and Michael. They search for him. Olivia sees condensation in the corner of the glass on one of the containers holding a dead Observer. She spies MIchael underneath the grate the body is lying on. She and Peter pull Michael out.Walter notices Michael cries when he sees Nina's body. BostonBack in the lab, Walter and Michael try on the ECOGs. Michael signals he understands Walter and remembers meeting Donald. When Walter asks Michael why he's important, Michael lifts off the ECOG and places his hand on Walter's face. A million scenes flash before his eyes, of getting Peter from the other universe, September pulling Peter from the lake, saving Michael the first time, working with September, working with William, meeting Etta, and finally of meeting a non-Observer version of September. "I know who Donald is. Donald is September," Walter says.
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Peter works on the amber in the lab with a laser to free the next tape. He stops when he thinks he hears something, but it's just Walter.It's the middle of the night. Walter thinks they can use the tank to get at his subconscious memory of Donald and get more information. Olivia checks on him in the tank, he's feeling sufficiently free and open with his swim trunks off. Olivia monitors Walter's blood pressure as it rises. In the tank, he remembers being in the same apartment from the flashes Michael showed him. Donald, aka September with hair, is there. Walter sees water and buildings out the windows. It's New York City. He's under a bridge. Astrid looks it up later and figures he was in Brooklyn near where the base of the Williamsburg Bridge was. Out of the tank, Walter is optimistic they'll find September. Windmark listens to a snippet of Nina mentioning a child Observer. Another brings word that "he" is ready to see Windmark.Windmark teleports through an Observer time grid to Manhattan 2609. Walter, Peter and Olivia drive to the building where he thinks he saw September. Peter is worried at how chipper Walter seems. He assures Peter that everything is fine and he no longer needs pieces of his brain removed. He realized and saw things when the boy touched him, including memories of Peter from the other timeline. "Who is this boy? How could he enable you to see a life you didn't live?" Peter wonders."Why would he give you back all those memories but not give you the plan?"Walter doesn't know. Walter loves Peter even more knowing everything they've been through. They share a good dad-son hug. In 2609, Windmark goes to meet with the Commander. He informs him the Anomaly (the boy) has been found in their timeline. "Someone ensured its survival because they thought it was important," he says. Walter finds the window from his vision. They go inside and knock on the door.Donald/September answers.He's surprised to see Walter, but even more so to see the boy. Sitting down inside, they catch September up to speed. Peter mentions they've lost a lot of good people to find him.He was apprehended before the invasion for his "continued interference in the timeline." As punishment, they removed his device, so he can't move through time.They experimented on him. Now he's human.The first movie he watched with Walter was "Singing in the Rain," and he chose the name Donald O'Connor. The boy joins them and Donald plays a tiny music box for him. The boy was born hundreds of years from now, created in a lab. It all began in 2167 when a scientist in Oslo was trying to find ways to increase human intelligence. He realized if he tinkered with the part of the brain that dealt with jealousy, he could boost intelligence, sacrificing emotion. The discovery was the catalyst for the creation of Observers.One by one, emotions were sacrificed to boost intelligence. In the Observer creation center, Windmark looks up the boy. Donald explains the boy developed differently.Windmark asks whose genetics were used to create him. Donald had been moved by fathers' affections for their sons before and helped them, as he did with Peter. So he took the boy and hid him in the past. He's Donald's son. Windmark briefs the Commander on September, making the link between him and the Fringe team. They still don't know why he'd want the boy.Windmark asks for a protocol suspension to go back and intervene, but is denied.The Commander tells Windmark the fugitives are inconsequential. There's a 99.99% chance the Observers will succeed.Windmark admits the idea of ending the fugitives consumes him. Back at Donald's, he explains Michael is even smarter than the Observers and has emotions. If they can send Michael into the moment of discovery he can show the scientists his more advanced kind of intelligence and emotion blend."When they study him, they will realize all that he is: living proof that they don't have to sacrifice emotion for intelligence and they don't have to go down that path," Donald says."And the Observers will never exist, they will never invade," Peter says. Donald came to Walter when he lost the ability to move through time. "That was the plan, we were going to send the boy forward in time," Donald says.They have to build a device, including tech from September's timeline in the future that he has hidden nearby. Olivia tells Peter she thinks it means they'll get Etta back."I want to believe that more than anything but we've still got a long ways to go," Peter says. Back at Observer HQ, Windmark learns about September extracting rocks at a mine. He orders September tracked. Windmark and other Observers transport into September's now empty apartment. They find a bloody device in the sink, he removed his chip.But a drink is still warm. Windmark looks through September's things including a Bible and snow globe of New York. His radio is set to jazz. The group pulls up to a storage facility to get Donald's tech. He sees Windmark in his home on a surveillance uplink. Windmark notices an Observer tapping his foot with the music, then the surveillance camera. They transport out just before the apartment is consumed by an anti-matter explosion. A loyalist brings Windmark surveillance footage of the group getting into the van. He orders a perimeter. In the storage facility, September finds what he's looking for. Walter tells him about his regained memories, including the night at Reiden Lake when September told him: "The boy is important, he must live.""You weren't talking about my son, you were talking about yours," Walter says.The boy also showed him that for the plan to work, Walter would have to sacrifice himself.September says that's true. Walter thinks the boy showed him all his experiences to make it easier for him to do what he has to do. September says it was Walter's decision to sacrifice himself for the plan, he would not have it any other way. "Do you remember getting a white tulip?" September asks, of the hand drawn tulip Walter got in the mail. (In Season 2, Episode 18 "White Tulip")He thought it was a sign from God. September took it from the other timeline because he knew it would give Walter strength. He gives Walter an envelope, but it's empty. Only Walter knows where he put it. Walter and September return to the van.Seeing their two small crates, Peter asks if that's it."You say that as thought we're not carrying technology that can bend space and time into a mobius strip," September says. September says he's not coming with them, he has a few more things they'll need before they get started on the plan. He places his hand against Michael's and promises him he'll see him again. Peter, Olivia, Walter and the boy hit a checkpoint on their way out of Brooklyn. They pull into an alley to call Astrid. She pulls up the surveillance feed and sees that they're surrounded. They pack up the contents of the van and head out on foot to a monorail stop that Astrid says is safe. They split up, with Olivia taking Michael. They walk past the check point unnoticed. Peter and Walter are about to follow when a car of Loyalists pull up with guns. Peter waits for it to leave then he and Walter walk past the check point. At the monorail, Olivia gets a call from Peter who says they'll be right behind. The station is swarming with Loyalists. Peter and Walter make it to the platform. Olivia watches them approach from inside the car, but they have to turn around when a squad of Loyalists comes. They get on the train in another car. The Loyalists come to search Olivia's car. She turns her back and Michael purposely steps off the train, face to face with the Loyalists. The train takes off and Olivia can only watch as the Loyalists walk away with him. Michael is brought to Windmark.
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