- The team hunts a killer who seems to be targeting couples - dehydrating the husbands and smothering the wives - with a very unusual motive. Peter and Olivia try to come to terms with her surfacing memories and emotions from the original time-line and the fact that she's beginning to forget parts of her life from the new time-line. Meanwhile, Walter and Peter try to figure out September's disappearance from the lab the week before.—John W.
- When a serial-killer kills husbands dehydrating her bodies and then their wives, Walter examines the bodies of the wives and concludes that the killer is using pheromones taken from the husband. Soon they discover that the murderer is Anson Carr, who has a skin disease and is needy of love. Meanwhile Walter finds a strange device implanted by September in Peter's eye and he succeeds to contact September and learn where the Olivia from his timeline is.—Claudio Carvalho, Rio de Janeiro, Brazil
- 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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