- This follow-up to last season's "Peter" flashback episode revisits a poignant period of time for both the Bishops and Olivia.
- Reiden Lake (6 months after Peter was taken from the Other Side.)
Peter's mom calls for him to come down to lunch. He's not in his room. She finds a note. It says "I'm going home."
Young Peter walks across the lake where Walter brought him from the other side. He has a cement block tied around his waist and uses it to smash through the ice. His mom reaches him in time to see him go through the ice. She dives in and unties the rope and brings him to the surface as he yells that she's not his mother and he wants to go home.
(roll cool retro '80s credits)
Walter leads his "daycare" with kids, including young Olivia, in Jacksonville. He tries to lead the kids to block out the world around them, but he's interrupted by someone announcing his wife is there.
Walter talks to Peter, trying to convince him the Dodgers do play in Los Angeles, not Brooklyn and the Green Lantern isn't red. Peter shouts that they're not his parents and he wants to go home.
Later, with Peter asleep, Walter and his wife try to figure out what to do. Walter says it was supposed to be a temporary mission. But it's been six months. Elizabeth wants him to build a machine to get him home, but Walter says the universe can't take it.
Walter tells her he's working with kids to allow them to cross over and take Peter with them. He just needs a little more time.
Olivia's step-dad yells at her for staying up after he told her to go to bed. She runs away from him as he terrorizes her. Suddenly she's in a field and blimp flies overhead. Then she's back in her house.
Peter's mom continues the lie to him. Peter says Walter "stole him" from the other world at the bottom of the lake. She watches him cry and suggests they get out of the house.
Walter comes to work and announces he wants to begin independent testing. He sees Olivia coloring alone. She has a black eye. She says she fell. He notices she's coloring a blimp. He asks where she saw it.
Elizabeth drives Peter around, showing him a field of tulips a professor designed to grow in the area. She takes him to a toy store. Peter looks at the toy airplanes.
At the center, Walter explains to his assistant that he thinks Olivia's crossing over was triggered by an extreme emotional response -- her black eye. He wants to design experiments based on the theory.
Elizabeth brings Peter by to visit. Walter tells his wife about Olivia. She's thrilled. Peter sees Olivia through the glass.
Walter writes a letter to William about Subject 13 -- Olivia -- explaining this theory. He tapes a session with Olivia, in which he monitors her vital signs.
He tries playing with her and logs no response to joy. He has her run on a treadmill but registers no response to exhilaration. He has her play with a set of blocks and harangues her as she does, but gets no response to anger. Next, she sits alone in an empty room. It's not loneliness.
He wonders if it's fear. He prepares to show her "Jaws".
She apologizes to Walter. He halts the test and lets her play. Suddenly, the lights go out and she's trapped in the lab.
When the lights come back on, there's a bloody kid on the floor. She sees him and screams, then disappears in a flash of fire.
Peter plays with his planes at home. Elizabeth hears sirens in the distance. She can't reach the center on the phone.
Back at the center, Walter cleans up the kid who was covered in fake blood. The kid doesn't think Olivia thought the "joke" was very funny.
Walter tells his assistant Ashley that he thinks the part of Olivia's brain that lets her starts fires also helps her cross over.
Elizabeth arrives and Ashley explains there was a small fire. And Olivia is missing. Peter hears.
Inside, his mom leaves Peter alone for a minute. He looks through the cubbyholes. Elizabeth leaves a note on Walter's desk but sees his notes.
Peter looks through Olivia's drawings and sees an angry man and on the next page the field of tulips.
Walter finds Elizabeth in his office and she asks him about his suspicions that Olivia's step-father is hitting her. He theorized that the combination of love and terror stimulates the key to Olivia crossing over.
Elizabeth is not a fan of the plan to allow Olivia to be terrorized.
Walter is worried about what will happen between the worlds if he doesn't get Peter back. If it means sacrificing Olivia to save hundreds, he's open to the idea.
Ashley the assistant comes to tell the Bishops that Peter is gone.
We flash over to the Other Side, where Walternate and Elizabeth are reeling from the kidnapping of their son. Walternate is drowning his woes in booze.
He's trying to figure out who Elizabeth saw that night that looked like him. She says it's inexplicable, but he doesn't want to let it drop.
She's tired of trying to remember the details. Walter can't handle that there's no explanation.
Later, she tells Walter she prays that Peter is safe and being taken care of and she'll see him again. She says his disappearance is breaking their marriage. She asks him not to go to the lab in Florida this week and to stay for their marriage.
The next morning, she wakes up alone.
Walternate pulls up to Bishop Dynamic -- not the sunny childcare center it is on the other side.
He wears sunglasses to work and drinks from a small flask as soon as he arrives in his office. The space shuttle is preparing for launch outside his window.
Back on the other side, they still haven't found Peter or Olivia. Ashley shows Walter Olivia's drawing of the angry man.
Late at night in the field of tulips, Peter finds Olivia. He has her drawing with him. He says it's the only drawing that looked happy.
She's sitting in burnt tulips. He asks about her eye and she tells him her step-dad did it.
She says she messed up and she's worried Dr. Walter will send her home. She asks if Peter trusts Walter. He encourages her to tell Walter about her step-dad.
Back at the center, Olivia and Peter return.
Later, Ashley tells Olivia that her step-dad is on the way. She runs to talk to Walter, who's sitting in his office. She tells him her step-dad hits her -- that's when she crossed over.
That's where she saw the blimps. She asks Walter if he can make her step-dad stop hitting her.
Suddenly, Walter appears in the office doorway behind her. The Walter she was talking to is gone.
Walter in the doorway asks her what's wrong. He takes her down the hallway to her step-dad.
Walter tells her step-dad that Olivia is special and if anything happens to scare her, he'll tell social services and his government friends will make troubles for him.
Walter tells Olivia to get some rest and they'll see if they can figure out a new way tomorrow.
Back home, Peter tells his mom he's sorry if he scared her when he ran off. "I'm never going back, am I?" he says.
Elizabeth tells him sometimes the world we have is not the one we want, but we can use our imaginations. She promises to protect him. He asks again if she's his real mother.
She says he was very sick and he must be confused. She assures him she's his mother. He hugs her and calls her mom.
She holds it together just long enough for him to leave the room, then chokes back tears of guilt. She goes for booze in the cabinet.
Walternate calls his wife from his office. He's looking at a child's drawing of two kids, holding hands. It says "Olivia and Peter." He tells his wife he knows where Peter was taken.
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