Olivia watches workers remove some Etta "Resist" posters plastered over the Observers' "The Future in Order" signs. Anil arrives and gives her an Observer chip, like the one Peter put into his brain.
Peter monitors his writeboards, tracking Captain Windmark and another Observer as they arrive at Etta's apartment. Examining the boards, the Observers realize Peter is foretelling Windmark's movements; he has gained the ability to run futures.
At Harvard, the eighth videotape reveals that Walter stashed an industrial-sized electromagnet (like ones used in auto wrecking) in Fitchburg, Massachusetts. Olivia arrives to tell him and Astrid what Peter did to himself.
Peter calls, and Walter begs his son to come back: he promised to keep Walter from slipping! But Peter just warns that Etta's apartment has been compromised and hangs up.
Peter is manipulating Windmark's future . . . but Windmark turns the tables, manipulating Peter's future too. During a violent confrontation, Peter kills the other Observer and battles Windmark. Before Peter escapes, Windmark shows him Etta's last thought: of being a happy child in the park with her parents.
Walter and Astrid determine that the chip boosts neural activity in the cerebral cortex, which controls higher-level thinking. As the cortex thickens, it absorbs the areas that control emotions.
Peter arrives suddenly, asking Walter to stitch up his shoulder. Desperate, Walter says the changes will soon be permanent. But Peter leaves, determined to avenge Etta by resetting Windmark's path and exploiting an opportunity to kill him.
Meanwhile, Olivia arrives in Fitchburg, where a woman named Simone says they've been expecting her. Simone's mother, and then Simone, kept the magnet for 21 years, believing the promise of a gray-haired man who said he'd use it to save the world. It's on a truck, ready for transport.
Simone, who is mildly psychic, had earlier perceived that Olivia had a bullet in her pocket. When Olivia suspects she's being set up, Simone also sees that Olivia has no faith. Olivia doesn't buy these "parlor tricks" . . . until Simone says she knows that Olivia lost her daughter - twice.
Before Olivia departs, Simone says her daughter is still with her, even now. But Olivia remains unmoved by Simone's serene argument that sometimes the answer lies in believing with your heart, not knowing in your head.
Two bandits capture Olivia and plan to turn her in for the reward. She escapes by shooting one with a gun rigged from a compressor and Etta's bullet, then killing the other too. Before leaving, she retrieves the bullet.
Walter tells Olivia where Peter went. She finds him crouching in the rain, waiting to verify that he reset Windmark's path. Tomorrow Peter will snap his neck.
Olivia says tomorrow he may not be able to feel anything - for her or Etta. He tells her about Etta's last thought. Olivia says Etta's still with them; she saved Olivia's life today. The love they share now is invulnerable to space and time, even to the Observers. Emotion isn't weakness - it's strength. If they lose their connection with Etta, she dies all over again. They can't let her be erased.
Peter spots Windmark. Olivia says you're not one of them; you're one of us. She loves him. Peter flashes back to emotional moments with Olivia, Walter and Etta. Contrite, he cuts out the chip with his switchblade. Olivia slips the bullet into Peter's hand as he collapses into her arms.