Hadley somehow realizes that House is not shooting up with heroin after all. I guess she has more faith in the writers than I do. She thinks House expected her or someone to sneak into his apartment and see him and this is all just another one of his games. For whatever reason, House decides to tell Hadley the truth: he is not injecting himself with heroin, but he is injecting himself with something. It's an experimental new drug that can regrow muscle. In rats. It hasn't been tested on humans yet, nor is it ready to be. But apparently, House decided that what was good for the rats would be good for him. So he got his hands on the experimental drug and has been shooting up with it and doing those leg-strengthening exercises in the hopes that he could grow his leg muscle back. And he decided to cook the drug in a spoon over his stove like that so that we, the audience, would all assume that he was using heroin. Right? I mean, it's not like the guys at the lab he got the drug from are cooking it up in spoons over a stove before injecting it into the rats. Why couldn't he just administer the drug to himself the way the rats are getting it? "You're an idiot," Hadley repeats. She leaves.

Ha! They didn't put Hugh Laurie in the anti-bulling House cast PSA, either because he was just too busy to do it or because it would have been kind of silly to have the guy who plays such a bully on the show to be telling us at home, during that same show, not to be a bully.

Chase operates on Wendy, implanting a small defibrillator in her chest to help with her heart problems. There's a lot of blood, but it's not just coming from the surgery site -- Chase also finds blood coming out of Wendy's vagina and her ass. How embarrassing! In the meeting room, the Cottages try to figure out if the bleeding is a new symptom or if someone made a terrible mistake during the surgery. I mean, you would really have to aim wrong to cause damage to someone's private area during heart surgery. Taub says there's no chance of that, and that they should assume it's another symptom. He wants to treat Wendy for a clotting disorder, but Foreman says that would simply be treating a symptom, not diagnosing what is causing it. Taub says that's true, but they should probably treat Wendy for the bleeding before she bleeds out and dies. Chase would rather talk about House and why he's been so absent for this case. He says it can't be Cuddy, since they broke up weeks ago and House has been in PPTH and treated patients since then. Yeah. Sort of. Hadley keeps quiet about House, leading the Cottages to pick up on the fact that she knows something they don't. She admits that she does, but won't tell them what it is, saying she respects House's privacy for some strange reason. I guess she feels obligated after he didn't tell everyone about how she killed her brother. He did tell them that she was in rehab, though, so I don't know why she can't just tell them that she caught House shooting up and let him deal with that fall out. Instead, she says they shouldn't count on House's help on this case. Foreman shrugs and starts listing off a bunch of diagnoses, only for Taub to get impatient and leave to treat Wendy for her silly bleeding problems. Taub is really not being a team player this week.