Walter puts Elizabeth in the waiting car, and Nina walks over to talk to him, removing her sunglasses. Good lord, they made her look younger too. I think they might have digitally inserted stock footage of her from The Days and Nights of Molly Dodd. She awkwardly tries to tell him how much William wanted to be there, but those dang meetings in Berlin, that she doesn't need to tell Walter how important they are to both of them. Walter doesn't look like he's really buying it. "He wanted me to make sure that you know how terrible he feels," she says. Which is kind of awful if it's true and not just Nina being a good sidekick, isn't it? "Make sure he knows how awful I feel," is what Bell said? "Yes, I understand. I'm glad you came," says Walter, kind of pointedly, and ducks Nina's attempt to touch him and walks around to the other side of the car.
Back in the Walter household, Elizabeth laments that they didn't give Peter a good life: "He practically never got out of the house." He was always too sick, says Walter. "He didn't go to a proper school. He didn't have any proper friends. He had no family but us. We kept him so well, we never let anyone else get to know him," she counters, and he quietly says that they did the best they could, and were dealt with what we were given. Walter sounds like he believes that's true, yet feels like it's still not good enough. In the second this-is-all-he-needs-for-three-Emmys clip, Walter says, "He knew he was loved." And you think maybe you can't feel sadder than when you're watching Walter's face slowly crumple, but then he looks at his wife and adds, pleadingly, "Didn't he?" and your heart shatters. Elizabeth gets up and walks away -- not angrily or accusingly or anything.
Later, it's dark. Walter sits on the bed while Elizabeth sleeps. She wakes up, sees him, asks what's wrong and notes that he feels cold -- has he been outside?
He asks her to come with him, and he takes her into Peter's bedroom, where he's set up his magic multi-universe window. She asks what it is, but instead of answering, he just turns it on, and Elizabeth can see Peter, sitting up in bed, playing with a toy. "Walter, what is this? How's this possible? How are you doing this?" she whispers. Walter gives his basic "window to another universe" non-explanation that fails to make Elizabeth's head explode, and after a moment he turns it off, which upsets her, and she pleads with him to turn it back on. He explains that he just wanted her to know that there's another Peter out there who will grow up safe and happy and normal, just not here. "And we must take comfort in this. And we must begin to move on," he says. You know, you probably could have saved the "we must begin to move on" part of the speech for at least the day after your son's funeral. Elizabeth kind of looks at him like "are you serious with this shit?" but then seems to accept it and walks out of Peter's room.