By the time the commercial break is over, Cuddy has switched the IV back to actual prednisone. Murphy's allergic reaction stopped, but her symptoms are back. Kaufman, having no idea what's really going on, figured that the prednisone wasn't working and decided to change his diagnosis to endocarditis. He then put her back on the antibiotics he didn't know she was taking before and she had another allergic reaction and almost died. Wow, that's about as wrong as things could have gone. And yet, House thinks they should switch Murphy's IV bags again, this time with an anti-fungal treatment. Foreman says no way -- the anti-fungal treatment is a dangerous poison that will cause her to develop more symptoms. House says that's okay, since the symptoms it causes are the same as the ones she has now anyway, so no one will know. Cuddy doesn't know what to do. Foreman argues against House's suggestion, saying it backfired on them once already. Chase and Taub finally speak up to agree with Foreman. Cuddy apologizes to them for getting them involved in all of this and says they can leave. They race each other out the door. "I'm right," House says. Cuddy says she thinks he is and she'll switch the IV bags, but -- oops! Martha just snuck into the office through the door the escaping Cottages left open. I guess they were so intent on leaving that they didn't see her or bother to let out a warning of her presence to Cuddy or House. Thanks, guys. Now Cuddy and House will have to kill her to keep her quiet. Lying is so complicated.
Martha looks over Murphy's file and says she agrees with House's diagnosis of fungal endocarditis. But she thinks the best course of treatment is a giant dose of the truth. Cuddy is shocked at Marta's inconvenient ethics, even though she was the one who forced Martha on House in the first place. She kind of deserves this, really. Martha babbles on about the patient being the highest priority. House heard all of this many times before, so he cuts her off and tells Cuddy to leave her own office so he can deal with Martha alone. Sucks to be Martha! Cuddy leaves almost as quickly as the Cottages did earlier, happy to let someone else do her dirty work yet again. House takes her spot behind the desk and informs Martha that if she tells anyone what's going on, he will have her kicked out of medical school and her career will be destroyed. Martha says she's willing to take the risk and hope that no one will believe any of House's lies about her. House says he's on a truth-telling kick himself, so all he'll say about Martha is the truth -- she drew blood on the coma patient even though his file had a form in it that expressly forbid anyone from treating him without permission from his family. Therefore, what Martha did was both unethical and criminal. Oops! "You told me ... " Martha says. House says he didn't, actually, since he made it a point not to say a word the entire time. "You set me up? Why?" Martha asks. Duh, Martha. "This patient is the highest priority," he says.