CTB heads home to her rather dull, personality-less apartment. I'm disappointed. I was hoping for some hellfire at the very least. There she finds House, who got in using a key he stole from Wilson. You know he went through her underwear, too. Creep. House accuses CTB of dating Wilson to get House to hire her. I'll bet it's never even occurred to House that CTB might be dating Wilson because she likes him. CTB removes her coat to reveal that she's wearing Wilson's McGill sweatshirt and damn proud of it. Ha! Wilson never let House wear his McGill sweatshirt. House comes up with another theory: he thinks CTB is waiting for House to realize he made a mistake in not hiring her and is dating Wilson to ensure that she'll be around to rub House's face in it when he does. "I can't wait. It's gonna be awesome," CTB deadpans. House comes up with yet a third theory, and he's starting to look desperate: CTB is just dating Wilson to toy with him and therefore with House. "Your goal is just pure feral vengeance!" House declares. Undaunted, CTB steps closer to House, who shows just a little bit of fear. "Which is it, House? Am I in this for you? Or am I in this for him?" she asks. "Give him back his sweatshirt," House growls. "Pit stains don't become you." With that lame insult, he limps off. Sorry, House, but I think CTB might have won that round.

Back at PPTH, House de-elevators to find Taub and Kumar, who tell him the tests for drug damage and endometriosis came back negative. What they do have, House says, is a new symptom. Or rather, an old one: Roz's complete change in behavior six months ago. While Taub agrees that converting to Hasidism is a sign of madness, "we can't just give her ten CCs of atheism and send her home." Pity -- a lot of the world's problems could be solved that way. House says Roz's "altered mental status" is a sign of porphyria, which I hate when this show has as a diagnosis, because I never spell it right. ["Hey, who's going to notice? Me?" -- Miss Alli] Kumar disagrees with the altered mental status diagnosis, saying Roz simply "didn't like her life. So she changed it." "People don't change," House says. Kumar points to Taub as proof that they can, saying he gave up a lucrative career as a plastic surgeon to work for House for peanuts. House has an answer for that, though: "He switched jobs to save his marriage. He did it to avoid change." "He's right," Taub admits; "you don't suddenly choose crazy without being crazy." Wow, Hasidic Jews are to Taub what fat people are to Chase and homeless people are to Foreman. I think a few lessons are going to have to be learned here before the hour is up! House tells them to give Roz hemotin and a "phlebotomy," the latter a fancy way of saying to draw some blood.