Thredson explains for the dumb ones in the audience that he realized what he'd been missing all those years: touch. "Skin-to-skin contact." But that cadaver was cold and smelled of formaldehyde, see. He tells Lana about the Harlow studies, where monkeys were used to prove that primates seek tactile comfort from mother figures. Anyway, that cadaver could not satisfy his cravings, and so we see him embark upon a series of murders, collecting women, removing their skin while they were still alive. The only one we actually see Thredson murder is the librarian -- the same flashback footage we saw when Thredson was trying to convince Kit that he committed the murders. We don't see Thredson kill Alma, however; which makes sense, because she's with the aliens. See how much sense that makes?? Thredson tells Lana that all that "work" is now behind him. And why? Well, it appears he's now found his "Mommy."
Back at Briarcliff, Sister Jude gets a call from Sam Goodman. She tries to tell him, yet again, that she's taking him off the case. "Anne Frank" wasn't Anne Frank at all, just some crazy woman. The thing is, as Goodman tells her, crazy or not, she got it right. Dr. Arden IS Hans Grouper, SS officer and Auschwitz doctor. Sister Jude is thrown. Goodman says the last thing he needs to officially prove it is a fingerprint. He tells her to be very careful -- Grouper is dangerous AND a flight risk. Just get the print and bring it directly to him at the motel. Sister Jude hangs up, and while you might expect Dr. Arden to be standing right behind her, it's creepy-little-girl Jenny. Which might be worse. She explains that her mother kissed her on the cheek, told her to be good, and left her there. Sister Jude goes to find Sister Mary Eunice to babysit this disconcerting little creature, which is obviously the best decision of the week.