Taub goes first, diagnosing Murphy with an autoimmune disease that Kaufman already thought of and started treating her with prednisone for. That's not good news, since if Foreman's diagnosis of endocarditis is correct, those steroids will suppress Murphy's immune system and thus kill her. Taub thinks they should bring this up to Kaufman, but House says he's been listening in on his bug and knows that Kaufman's assistant already came up with the same endocarditis theory and made the same argument and if Kaufman didn't listen to him, he certainly won't listen to them. So, House says, the only solution is to switch out Murphy's prednisone with some antibiotics. Of course. Oh, and House can't do it because Murphy hates him and would obviously notice him in her room messing with her IV bag, so it will have to be one of the Cottages performing this incredibly illegal act. Chase and Taub sit in the back and let Foreman fight this battle for them. There is shouting, but neither man is really mad at the other one because House knows what he's asking his employees to do and Foreman knows why House is asking them to do it. Oh, wait, nevermind -- he threatens to fire them if they don't do his bidding. So he's still a horrible person. He leaves, and Foreman tries to mobilize the three of them against House, saying he can't fire them all if they refuse. Chase breaks rank immediately, saying he's doing it because he truly believes the endocarditis diagnosis is correct and Murphy will die if they don't act. Also because Chase is a coward when it comes to House and will pretty much do whatever he asks.
This leaves Taub and Foreman sitting around the meeting room waiting for Chase to return. Taub whines about how he's just sitting back and watching as Chase risks being fired and/or jailed to save Murphy when he used to be a good doctor who did good things for people who needed him. This is more about Taub's conflict over whether or not he should do something about that kid's brain bleed than it is about Murphy, obviously. Foreman knows about this and tells him not to interfere; plenty of other doctors looked at the scan and didn't see a problem, so Taub has a lot to lose and nothing to gain by going to the kid's parents. Chase returns to the room, his mission a failure after Cuddy's sister saw him in the hallway and recognized him from some charity function they both attended. If he goes to Murphy's room and switches out the bags now, he's sure to be recognized. Either Foreman or Taub will have to do it instead. Foreman says he can't; he was at the same charity event so Sister Cuddy will know him, too. Taub says he won't because he doesn't know what to do about anything anymore. Fortunately for him, he doesn't have to make a decision because Jamie texts him, summoning him to his office to look over another case. He leaves Foreman and Chase to deal with House's mess.
In the end, Taub doesn't help Jamie or House. Instead, he waits until, like, the next day (it's light outside now when it was dark in the last scene) to go to the kid's house and tells his mother (the kid, named Timothy, as all sickly children must be named in works of fiction, can't get to the door because he's stuck in a wheelchair thanks to that pizza delivery man and his mother apparently moving the furniture too close together for him to wheel by) that he's a doctor who saw Timothy's medical records and thinks she should get him to a hospital for a cerebral angiogram right now. Unfortunately for Timothy, Taub recommends taking him to PPTH, so he will die.
After the break, House rounds up his Cottages (sans Martha, who is still drawing blood from the coma guy, I guess?) to insult them for their apparent inability to switch out a simple IV bag. He tells them to wait for Murphy to take her afternoon nap and then think of a way to get her sister out of the room and switch the bags.
Meanwhile, we find Martha in Cuddy's office. "Is now a good time to talk?" she asks. "Not really," Cuddy says. Martha talks anyway. "Why are you still here?" Cuddy asks. Martha doesn't seem to realize or care that Cuddy and House are dating and so telling on him to her is useless and stupid, and says that she thinks House is still treating Murphy even after Cuddy ordered him to stop. "I'll look into it," Cuddy assures her. How can she look into anything when it's almost pitch black in her office? Martha says Cuddy might want to look into this now, since she checked with the pharmacy and saw that Chase ordered prednisone and antibiotics (I guess he needed the prednisone label because House's label-maker isn't working anymore?) for the coma patient even though he doesn't need either medication. Murphy, on the other hand, might. Martha thinks House is planning to switch out her IV meds.
Cuddy heads for House's office, which is just as dark as hers (seriously, guys. Turn a light on. One light won't destroy the environment) and confronts him. He doesn't understand the problem; she told him to do whatever he needed to do, and he is. Cuddy is a moron, so she didn't realize that that meant he would actually do whatever he thought he needed to do, and that such things could be life-threatening even though House does life-threatening and ethically questionable things to his patients every single week. House says Cuddy intentionally didn't think about what he would have to do because she doesn't want to make any tough decisions, which is true. She seems to realize this, and asks him if he's 100% sure that it's endocarditis. House says she knows he can't be, but that endocarditis fits better than any other diagnosis. Except for, you know, whatever the actual diagnosis will be, since we all know it's too early in the show for House to be right. He asks Cuddy for help with the IV.
Cuddy messes with Murphy's IV bags and asks where her sister went. "She's got a family," Murphy says. Cuddy points out that she, too, has a family. That just sets her up for Murphy to say "three kids and a husband -- that's a family." Cuddy decides this is a good time to ask her mother why she has always been harder on her than her sister, like when she made Cuddy be her high school yearbook editor but let her sister do whatever she wanted. Murphy's like, "um, that was decades ago." Cuddy says she still treats her that way. Murphy says if Cuddy wants her to tell her that she loves her and her sister equally, she does. "Okay," Cuddy says, and starts to leave. But Murphy isn't finished. She feels the need to add that she likes Cuddy's sister more. Why would she even say that? So unnecessary.
Taub finds Foreman relaxing in the light-free doctor's lounge. Foreman says the angiogram results on that kid came back. He points something out on a film that I don't know how anyone can actually see since, again, there is no light in the room whatsoever, and says the thing Taub thought was a bleed in Timothy's brain was actually just an "anatomical variant" that Timothy was born with. That means Taub risked everything and there was nothing wrong with Timothy after all. Oops.
There is, however, something wrong with Murphy. She's having trouble breathing and all the symptoms of an allergic reaction. But, Kaufman says, that's impossible since Murphy was on prednisone, which is used to treat severe allergic reactions. Way to switch Murphy's prednisone out for an antibiotic she's allergic, too, idiots.
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