At the Boston FBI office, Phillip Broyles describes the abduction to Olivia Dunham. This is not the first abduction of this kind; three other people are known to have been abducted by a woman meeting the same description. The previously abducted eventually turned up, physically unharmed but mentally insane, unable to remember what happened to them. Olivia observes that all the previously abducted were academics and experts in their fields, and Ben Stockton doesn't fit this profile. Walter Bishop, who has been listening in, says something about lights: green, green, green, red, like Christmas lights. He's heard this story before, but he can't recall where or when.
At the Harvard laboratory, Walter is singing Christmas carols in an attempt to jog his memory about where he heard the story of the lights. He still can't remember, but he does recall an experiment he did for an advertising agency that involved flashing lights to induce a form of mind control. The experiment failed, but Walter thinks flashing lights might have been used to put Jeremy in a hypnagogic trance while his son was abducted. Walter believes his previous experimentation failed because he studied only the speed and intensity of the lights, not their color. He asks Peter to looks at some lights. Peter stares as they flash... green, green, green, red... but concludes that it's not working. Then he realizes that his sleeves have been cut off. When he asks Walter if he did this, his reply is "You did."
Walter presses Dashiell for information about where his abductor took him. Dashiell begins to cry. The woman promised him beautiful things, but then she took them away when he couldn't solve the equation. She hurt him and put him in a dungeon, where she tried to suck the answers from his head. As Dashiell says these words, we see where Ben is strapped to a chair in a basement, with wires coming from his head while Ostler takes notes. But when Walter presses Dashiell for a location, all he can remember is a red castle. 781b155fdc