- The Fringe Division begins to wonder if Peter or his presence is behind a series of time displacements between 2007 and 2011. Walter imposes a self-exile to his bedroom.
- When a series of time disturbance happens bringing events from 2007 to 2011, the Fringe Division is assigned to investigate. Broyles orders Olivia and Lincoln to bring Peter with them to help the investigations. Soon Peter suggests a means to locate the source of the disturbance and Walter helps him to find the spot. Soon they discover that the electrical engineer Raymond Green and his wife, the professor of theoretical physics are the responsible for the events and there is a time bubble surrounding their house and keeping the place in 2007.—Claudio Carvalho, Rio de Janeiro, Brazil
- 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.—Fox Publicity
- Olivia lays on a picnic blanket in the park. Peter joins her and caresses her face. Walter swings on the set nearby. They decide it's a perfect day. Olivia tells him they can't ignore the problem here. She turns cold and tells him he's the problem.
Peter wakes up in his holding cell with a start. Olivia comes to see him. There's something going on and they think it has something to do with Peter's arrival. They think it has something to do with time.
At an apartment building in Central Village, Boston A mom does dishes but when she looks away her kitchen has turned to ash and her daughter is gone. She finds a baby crying in a crib. She runs outside and sees evidence of a fire on the building. There's a time shift and the building goes back to normal and she's holding her five year old daughter again.
Olivia and Peter drive. People are reporting time loops. "What is a time loop? Like 'Groundhog Day'?" he asks. Olivia tells him they experienced their own time loops before he arrived. She's taking him to Massive Dynamic to run more test. Walter wants nothing to do with Peter.
Lincoln calls with another incident. At the apartment building, Astrid tries to work Walter's gadget, which causes him to conclude the event is not caused by a bleed through from the other universe. Olivia instructs Peter not to talk to anyone at the apartment. Broyles tells Olivia about the girl turning from a five year old to an infant.
The scorch marks burned in a perfect circle, like the fire was in the shape of a ball. There was a fire in the building four years ago.
Broyles insists Olivia take Peter to Walter for examination, even if Walter doesn't want to.
Back in the lab, Walter insists on calling Peter "the subject" as he examines him. Walter doesn't think Peter is the cause of the time line phenomenon. Peter suggests Walter isn't considering the possibility enough. Peter's surprised to learn Walter lives in the lab.
Peter thinks his return might have damaged the space-time continuum. Peter starts doing equations. He thinks the events are going to keep getting worse.
A group full of teens drive to a concert on a back road. A train appears out of nowhere and phases in and out as it passes them.
Olivia finds 65 time slips in the last 72 hours, all in a 40 mile radius of downtown Boston. They assume there are twice as many unreported. There are lost moments, frozen time, time jumps.
Walter emerges from his lab for food. Olivia asks for his input. Walter ignores Peter and wants him to leave. Olivia mentions the visions Walter was having of Peter, and the dreams she was having. Lincoln comes to report the train sighting. Peter picks up a machine and walks to join them, but then suddenly he's already at the scene. He had a time jump.
On the way back, Lincoln finds the last train to run on that line was four years ago. Peter starts to say something, but suddenly he's back arriving at the scene. "This is going to start getting annoying," he says of the time shifts.
He examines the car the kids were in and breaks off a piece of the bumper. He yells to tell Olivia but then he's back in the car, leaving the scene. He tells Olivia and Lincoln there are heightened levels of neutron radiation, but he just discovered it a second ago. Neutron has to be generated by someone, it doesn't occur in nature. Someone is causing the time events.
A man (Stephen Root) finds his wife doing equations in their living room. His watch is counting down from 45 seconds. She reminds him of several tasks as he scribbles furiously and offers encouragement. As his watch ticks down to zero, he kisses her on the head and she disappears. The equations and papers are gone.
He goes to the kitchen and gets some tea and brings it to his wife, Kate. She's in the other room, sitting still in a chair. She doesn't know who he is.
Walter zones out listening to "Too Much Time on My Hands" in the lab as Peter tries to figure out where the neutron pulse is coming from. He thinks it's near the fire and train crossing. Lincoln gets two new reports and marks them down on the map, both from four years ago. Walter takes off his headphones and thinks they're occurring in the shape of Fibonacci's time spire, like a snail's shell or ram's horn. He draws a spiral on the map and puts the origin in Brookline.
Cut back to Raymond tending to his wife Kate. He goes to work on equations on a computer in his basement, typing them from his wife's notebook. The computer powers up and we see copper coils and wires all over the basement. There's a clock set at zero. He flips a switch and it resets to 47 minutes. He races upstairs and finds his wife back at the table in the living room, furiously working on her equations again. She's a line further in her work than she was before. His watch counts from 47 minutes.
Peter and Olivia talk to people in Brookline. He asks her about the dreams she had and if they were at a park, with Walter on a swing set. He asks if she felt anything. She says he's a stranger, so what would she feel?
Kate sends Raymond to look for her book on differential equations. He hears police outside. His wife yells for him, with a breakthrough. He tells her he has to show her something and takes her downstairs to show her the room he built her from her equations. He tells her time chambers are possible, but she has to complete her work so they can keep it open. She was in 2007, he tells her it's 2011 outside.
Back outside, an agent walks up to their front door. Olivia sees him scream like he's inside a bubble. Then, in a poof, he phases out and is gone.
Olivia walks toward the house. On the phone from the lab, Walter tells her to spray fingerprint power in the air and as she does she can make out the outside of a bubble. Walter thinks whatever is happening is in there. Peter says they need a Farraday Cage to get in, something mobile. Walter hears Peter's suggestion and gets indignant. "I need a computer battery, and a spool of copper wire, and a climbing harness, and some rubber cement. I think it's in my Spider-man fanny pack," Walter says.
Lincoln suggests they follow the spiral out to see where the next resulting event will happen.
From inside, Kate looks at the police and tells her husband to turn it off, that it was just a theory and it wasn't meant to be built. She demands to know why he built the machine. He tells her he lost her.
Broyles looks up the couple. Raymond is an electrical engineer and Kate is a professor emeritus in Theoretical Physics. She retired three years ago due to early onset Alzheimer's.
Lincoln traces the end of the spiral to a tunnel under a river that didn't exist four years ago. If it phases out, all the people in it will drown.
Astrid arrives with the harness Walter built. Peter and Olivia briefly argue over who's going in, but Peter points out it has to be someone with a science background. Walter can't guarantee what will happen if it breaks down while Peter's inside.
Peter puts it on and approaches the bubble. His arm passes through OK, so he takes a step in. He makes it through. Walter grudging acknowledges it was a good idea and that Peter is very smart.
In the basement Raymond urges his wife to finish the equation. She tells him she already did, that's why she called out. She just hasn't written it down yet. They hear Peter upstairs.
Peter finds the basement and goes down. He sees the computer and the equipment, but Raymond knocks him out by whacking him over the head. Kate yells at him, asking what he's done.
Lincoln calls from the tunnel. They're clearing people out, but there's a giant bubble filling the tunnel, slowly spreading.
Peter wakes up in the basement to hear Raymond explaining how he first got results three days ago. He started with five minutes and has it up to 47.
Peter gets up and confronts them with a baseball bat. He goes to shut the machine down, but Kate says there could be repercussions if it's not shut down properly. He tells her about the dead agent and deaths that will occur if the tunnel ceases to exist. She was afraid of time displacement. She agrees to shut the machine down if Raymond gets immunity. There's no way he could have known.
Peter comes outside and communicates with Olivia via walkie talkie, telling them they have conditions. In the basement, Raymond tells his wife that she got sick so fast and he didn't have a chance to pay her back for all the things she did for him. There's less than five minutes left on the countdown. He tries to get her to write down the complete equation, saying he can rebuild the machine. She says it'll have to be somewhere remote. She takes the pen as the clock passes 3:30.
Water starts pouring into the tunnel.
With 1:30 left, she finishes writing. Peter comes back and assures Raymond he won't be prosecuted. Kate kisses her husband and tells him she loves him. Raymond shuts off the machine. His wife stands in front of him and puts her hand on her book of equations as she phases out. In the tunnel, as people are running and screaming from the tunnel and pouring in water, it suddenly disappears and goes back to normal.
Raymond comforts his wife as FBI agents take things out of the house. She back in the grips of Alzheimers. Raymond looks to make sure no FBI is watching then takes out Kate's book of equations. It's completely blacked out. She crossed all her work out. There's a note at the end. "Raymond, I love you. How you repay me. Just love me and live your life," it says. He realizes what she's done.
Olivia and Peter return to Fringe Division. Broyles compliments him on a job well done, saying it looks like Peter wasn't causing the events. But Peter thinks he might have actually had something to do with it since he overheard Raymond telling Kate he only starting getting results three days ago. Peter arrived three days ago.
Peter thought it was the time line that had to be reset, but it's him. He thinks he's in the wrong place and all the people he knows and loves are somewhere else. Broyles says in the mean time he can make him more comfortable. He mentions the home Walter owns on camus. Peter goes to his old house with Olivia. There will be an FBI agent out front. Peter laughs at the idea, asking where he'd run to.
Olivia says she'll talk to Walter and see if he'll help Peter.
"I was important to you, wasn't I? The other version of me," Olivia says. Peter says she was. "I hope that you get back to her," Olivia says. "Me too."
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