Carly asks why she's getting another angiogram. Foreman says that there was a "shadow" on the first, neglecting to mention that that's what hypothetically might have been on it, had they actually gotten a picture of her right leg. Carly complains that her chest hurts. Foreman tells her not to worry about that, even though every single time a patient starts complaining of something minor, it immediately turns into a seizure or respiratory arrest, which is the case here. The Magic School Bus Cam shows fluid going into Carly's lungs. "She's drowning!" Foreman says.
House stares at the Whiteboard of Symptoms. Standing out in the hallway, for whatever reason, Cameron tells him that they drained the fluid from Carly's lungs and stabilized her, and that the real angiogram showed no clot in her leg. "I'm thrilled," House says non-thrilledly. We go into a montage of him staring at the whiteboard and twirling his cane, and then he erases the board and writes down Carly's "psych symptoms," which include withholding pain, shame, and, of course, CONTROL.
Carly sleeps, but she is not alone. House lifts up the sheet over her leg, revealing an intricate pattern of old and new cuts. Nothing would be a better lesson to him on the importance of wearing a doctor-identifying white coat than for Carly to wake up right now, see some strange guy staring at her thigh, pull out the handgun she always keeps under her pillow for CONTROL purposes, and shoot him. But she doesn't, and House remains white coat-less.
House finds Wilson having lunch outside and says that Carly needs a heart transplant, which he knows despite the fact that the test results that will prove this aren't in yet. He won't tell Wilson how he knows, since Wilson is on the transplant committee, and knowing whatever House does would put Wilson in a really bad position. Wilson asks House why he brought it up in the first place, which I would like to know as well, since House won't tell Wilson anything and it still puts Wilson in a bad position because he knows that something is up even if he doesn't know what exactly it is. The Cottages run up and say that the latest test results show that Carly is in severe congestive heart failure, and will need to be put on the transplant list. House says she's already on it.