So it appears that every FBI agent in New England has turned out for another raid, despite it appearing that they haven't even confirmed whether Peck is there or not. An agent tells Broyles that the lab registered to Peck when he was a professor there was lab 107, which has windows, so Broyles orders some men onto the rooftops. Walter's a little concerned about all the guns, and Peter asks Walter if he wouldn't rather go back home. Walter says no.
While Peter goes off to talk to Broyles, Walter seeks out Olivia: "If we are correct and, for Peck, this is about bringing a dead loved one back to life, then Peck and I have something in common. Let me speak to him." Olivia seems unsure, and Walter acknowledges that the only way ensure Peck doesn't jump is to kill him, but Walter thinks he can convince him not to. Olivia takes him to go talk to Broyles.
Inside the lab, Peck's listening to Gary Numan's old band the Tubeway Army, an old minor hit from the '70s called (of course) "Are Friends Electric?" Meanwhile, he's -- oh, GOD this is gross -- inserting a piece of machinery under the skin on his torso. Is that his nipple?
The music is shut off, startling Peck, who turns to see Walter standing there. Walter raises his hands and says he's not a threat but an ambassador. "I know who you are. You're Dr. Walter Bishop. I've read you. New Frontiers in Genetic Hybridization," he says. Didn't the film version of that sweep the Oscars? Walter says he knows that if Peck wanted to, he could disappear from there in a second: "Please, trust me."
So Peck prepares a pot of tea while he and Walter chat about the laws of nature that aren't binding, and the places on earth where two plus two don't equal four. "You've figured out how to bend time. But you're only interested in traveling to the past. Your goal, your next jump, is the 18th of May," says Walter. Peck's a little surprised that Walter knows about it, but confirms it.
He wanders over by one of the windows, and Walter warns him not to do that: "Don't stand there! There are snipers outside! Stay away from the window." Amusingly, outside, Broyles, listening in, turns and glowers and Olivia and Peter, who wisely don't say anything when Broyles growls that he hopes that Walter knows what he's doing.
In the lab, Peck asks what Walter wants, and Walter says his calculations show what Peck must already know: "An enormous amount of energy will be drained from wherever you arrive and a large number of people will be killed," he says. "But each jump back clears that slate," says Peck, and I'm really not sure I understand that it does, but WHATEVER, and Walter points out that at the very least, the victims around him when he makes his last jump back to pull his fiancée out of the car will be dead.
So Peck sits down and tells Walter a long story about how on the day of the crash, he and Arlette argued about going to a store to register for some wedding gifts, and he "hurt her feelings" and left, and then was drawn to a large red ball on the horizon that turned out to be a hot-air balloon, moored on the city's outskirts in a field, and he spent the whole day in the field looking at the balloon. In all fairness, that does sound more fun than spending the day registering for wedding gifts. Anyway, he had an epiphany there on how to physically apply his theories of time travel, and he was in that field the moment she was hit, so he knows that if was with her, he'd never have had that epiphany. "I'll jump back into that empty field, Walter. And I'll only drain the energy from the plant life. Energy will be dispersed, no one will die, and I will pull Arlette from that car and I will save her life." Yeah, but, again, no one will die except the ten-months-younger Alistair Peck, who will die, and thus never implement his time-travel theories, so he won't jump, so therefore won't die in the field, and this will implement his time-travel theories... anyway, you get the idea. I'm not sure I like the explanation that Peck isn't so much time-traveling as he's jumping back into previous versions of himself because of a) the memory thing and b) because of the constant modifications to his body to survive the jumps. Anyway. That's all I'll say about it, at least until the next PARAGRAPH.
Walter seems to be impressed by that idea, although he doesn't ask how it is that Peck can choose where he goes back to. At first I thought maybe that supported the idea that you can only jump back into yourself -- and then I remembered that Peck wasn't in the train car, until he suddenly was.
ANYWAY. Walter says he knows why Peck hasn't jumped back yet: "Because you don't know how to. You haven't been able to jump back any further than the train." He stands up and pulls out his hidden microphone, and unplugs it. Outside, Broyles gets static in his ear and yells at someone to get the signal back online.
In the lab, Walter, who is a geneticist who couldn't really understand Peck's formulae, tells him that he's approximating the time curvature with a seventh-order polynomial, when, for the distance Peck requires, it should be at least nine. "I've read you too," he says by way of explanation.
An agent tells Broyles that they can't get the signal back online, because Walter turned the radio off. Broyles gives Olivia one of those bowels-evacuating glares and then orders via the radio for a team to get up there, now.
Inside, Walter says he's told Peck how to do it, and now he must not! You can imagine if Peck agrees with him. Walter says, "You'll never be able to live with the consequences," but he's not talking about people dying. And then he gives Peck the abridged version of the story of him taking Peter from another universe. "And since then, not a day has passed without me feeling the burden of that act," he says.
And while the tactical team storms the building, Walter sits down to tell Peck something he's never told another soul: "Until I took my son from the other side, I had never believed in God," he says, but now he figures that he betrayed God by taking Peter, and everything that's happened since has been God punishing him: "So now I'm looking for a sign of forgiveness. I've asked God for a sign of forgiveness. A specific one, a white tulip." Is that what he was talking about when he told Olivia he was waiting for something? You're not going to tell your son that he's from another universe unless you get a white tulip? Peck points out that tulips don't bloom this time of year, but Walter didn't specify "in spring" or anything. Besides, "he's God," points out Walter. "And if God can forgive me for my acts than maybe ... it's in the realm of possibility that my son, possibly, may be able to forgive me too." I'm not sure where Walter is getting that, since one of the central tenets of Christianity is that God will forgive absolutely everything that one is truly sorry for.
Peck sounds like Walter must have used to sound, as he leans forward and says, "God is science. God is polio and flu vaccines and MRI machines and artificial hearts. If you are a man of science (Dr. Jack Shephard?), then that's the only faith we need."
And we watch as the boots of the tac team make their way down the hallway, like JUST HOW FAR AWAY did they set up? Nice that they sent Walter in alone to talk to a guy who they think killed twelve people whilst being so far away from the suspect that it's taken them five minutes of running and THEY'RE NOT HERE YET.
Fortunately, this gives Walter time to give Peck a warning, that there will be repercussions if he pulls Arlette from that car: "You don't know how things will be changed by your actions, but they will." It's not our place to adjust the universe, Walter says, adding, "And you will never be able to look at her again without knowing that, just like every time I look at my son." And she'll ne