Remember the interdimensional antichrist Olivia's supposed to have been looking for all this time? He has a name -- Newton -- and he's been a busy boy. He and Curtis from 24 have been going around removing stuff from the brains of schizophrenics, rendering them inexplicably sane. Of course the Fringe team can't let that go unanswered, especially since they know Newton is behind it, so Walter figures out that the victims were driven insane in the first place by having pieces of someone else's brain parked there for years. And that someone else is -- wait for it -- Walter himself. Unfortunately, Peter and Olivia are inexcusably slow in figuring out that Newton is going to want to put Walter's brain back together for reasons that can't possibly be altruistic. And by the time they do, Newton has Walter. Before Peter and Olivia catch up, Newton has forced Walter to reconstruct -- and worse, share -- his memories of how he built the portal between worlds. Olivia nearly prevents Newton's escape, but the evil bastard had the foresight to inject Walter with a neurotoxin, and the only way Olivia can save him is to let Newton go. Which she does, saving Walter, although the old bits of his brain fail to survive the ordeal, forever snatching away the possibility of restoring the sanity that's been tantalizing him al episode. But ultimately he does get one old memory back; the memory of those pieces of his brain about to be removed by none other than William Bell.
Late at night, an array of courtyard lampposts illuminate a set of floaty letters reading "HENNINGTON MENTAL HEALTH INSTITUTE BOSTON, MA." Amazing how a block of text that large can get off the ground. Inside, the corridors are dark except for the light coming from the crack under a door. Behind that door, a man mumbles disconnectedly about a girl in a red dress with flowers. A pair of hands sheathed in bloody surgical gloves is at work behind him, their owner telling "Mr. Slater" -- played by Jeff Perry -- to think and it will come back to him. The hands turn out to be attached to a person, which was not always the case for that person's head. Yes, the last time we saw his face, it was still reattaching itself to a body back in October. Finally, the stolen frozen head is back in play. One also notices that its color has come back, and so has its hair. "Container," he calls to his hench-nurse, doing something with a pair of retractors. He tells Slater in a pleasant British accent, "Hold very still, and I assure you there will be no pain." In an extreme close-up, it looks like he's pulling a pale sliver of something from the living, bloody brain matter, but that can't possibly be the case. He sets the chunk into a vial of greenish gel and says to his hench-nurse, who is about as scary-looking as Scott Hamilton circa 1992, "Let's close him up." They start to fire up a piece of machinery, but the hench-nurse is getting a call on his earpiece from Curtis from 24, who is parked in a van outside and notifying him that he sees an orderly moving around in one of the windows. The hench-nurse goes to deal with it, "deal with it" in this case meaning "putting two silenced bullets in the orderly's chest." Hence the "hench" in "hench-nurse." He goes back in and tells the boss -- now busy with some kind of laser -- that they have to go. "My sincere apologies, I'd rather not leave you in such a state," he says to his patient, but they pack up and take off. The hench-nurse quickly opens an electronic lock to a door opening to the outside, and the boss takes a look around the hall behind him while following him out. Then they get into Curtis's van, which drives off. Poor Slater is left sitting there, and that's how a nurse finds him. With the entire back of his scalp peeled down, exposing his brain. "Help me," he begs. Ooh, Fringey!