In the Other Universe, a dude drills people in the back of the skull, kind of pulls out their memories, and makes them freeze from the inside-out. Our Universe is asked to find the killer's doppelganger (a professor/profiler who specializes in serial killers), bring him Over There, and see if he can lead them to... himself. The FBI tranquilizes the guy to transport him.
God, I love Fauxlivia's red hair and kickass pants and boots and bad attitude. Too bad she's such a bitch to My Olivia. Other Lincoln is by far superior to Our Lincoln, gun strapped to his leg and all, and he and Fauxlivia are soooo cute together. Too bad Charlie was off on his honeymoon with the Bug Lady. It's pretty amazing that these actors play 2 different yet identical people and make them look and feel so different -- too bad they'll never get Emmy love because the Emmys stink.
As Our Professor is looking through Their Killer's apartment, he sees a picture of his father. Well, that little charade didn't last long, did it? Who thought that was a good idea? The Other Universe has bad judgment. Aren't they going to have to kill him now?
Our Professor admits that he had creepy, violent tendencies as well (killed some animals in his youth), but got mentally-healthy because of a woman who took care of him as a child. He sneaks off because he knows where his doppelganger will be hiding, and tries to talk him down. Instead, The Killer drills him in the back of his skull and hooks their brains together (what else did you expect - this is Fringe) so he can pull out Our Professor's memories of the woman who helped him. The Killer ends up killing himself, and Our Professor is left without memories of the woman, or memories of the time he's been helping Fringe Division. Convenient.
Oh snap! Guess what? Other Broyles isn't dead!!!!! When Peter rewrote the timeline he's alive! YAYYYYY! The tight tee shirts are back!
Walter doesn't do much this episode, but he reenacts an 80's Memorex commercial, blasting Mozart to soothe himself and drown out Peter. This Walter is clearly even more off his rocker than ever, plus he's haunted by flashes and sounds of Peter. In his grand tradition of botching names, Walter calls Lincoln "Kennedy".
This Week's Code: LIMBUS. At first I thought I translated it wrong, but the internet is a beautiful thing. It's a Latin word meaning "edge, border," or "region on the border of Hell," and thus sometimes used in English for limbo. Nice.