Walter goes for a stroll outside. Well, outside the building, which is still enclosed by metal bars. Kim's outside too, sitting still on a bench. Walter strolls past, and then turns back and apologizes for upsetting him last night. "Go away," says Kim. So ... we're cool? Walter puts his face between the bars and sees someone outside the building across. It's Cardigan Walter! I hope they put out Cardigan Walter when the Fringe action figures come out. Freaked out a little by seeing himself watching, Walter goes and sits down next to Kim, and tells him they're the only hope for a little boy in trouble. Kim says he doesn't want to talk about math, so Walter asks him about where the woman took him. Dashiell, very distressed, tries to pretend there was no woman, but Walter keeps pushing him, telling Kim the boy will "end up like [them]." Kim: "It was so beautiful. She promised me things. What I wanted most of all. But when I couldn't solve the equations, she took it away. Everything she promised, it was all a lie."
While he's talking we see Ben, except instead of sitting at a piano with his mom, he's in a chair wearing some sort of electrical headgear, staring out into space, running his hands over some kind of laptop keyboard. Joanne's sitting next to him, taking notes.
Kim continues: "None of it was real. She hurt me. She put me in a dungeon. She filled my mind with images of the people I loved, and then tortured them, ripping them apart." We see Ben's mom bleeding on the piano, and then watch Ben twitching and seizing in his seat. Walter asks where he was. "I told you. A dungeon," says Kim. "No, no, no. Not some fantasy, you nitwit," says Walter, taking his compassion cues from his son, I see. He asks again. "A dungeon! A dungeon in a red castle!" says Kim, and Walter keeps trying, saying this is the only way they'll find him. Kim's crying by this point, saying none of it happened, that it was just a bad dream, and crumples into Walter's arms.
Peter strides down the corridor to the security gate next to Sumner, completely dwarfing him. Sumner says Peter's making a mistake: "Despite whatever strings you've managed to pull, your father is not mentally fit to be released from this hospital. Peter says his own personal assessment is that he's safer with him than with Sumner: "He may not be the picture of sanity, but yesterday when I saw him come through that door, I saw him change. He was afraid." Sumner, rather defensively, thinks Peter's implying that he intentionally harmed him. Peter doesn't say anything. Sumner checks the papers on Walter's release. "Office of Homeland Security? How'd you pull this off?" Peter wants to know what he means, and Sumner says he's checked up on Peter and knows about his phoney credentials at MIT, and running away from failed businesses. And that time Peter slept with that chick and didn't call her! Peter asks if he has a point: "You are not a fit guardian for Walter, and I'm going to petition the state to have him removed from your custody," adding that Walter is a danger to himself and others. "Then I guess the apple doesn't fall far from the tree. 'Cause you may think you know what he's capable of, but you have no idea what I'm capable of," says Peter, glaring as best as he can. "Are you threatening me?" asks Sumner, looking almost excited about it. Peter just looks away and says he'd like to see his father. "Uh-huh," says Sumner, half-smiling. They go in through the security gate.