Chase and Foreman run a camera through Hank's bile ducts to look for evidence of sclerosing cholangitis. Instead of doing their jobs, though, they take a minute off to talk about House's influence over Chase and how Foreman fears it'll cost Chase his marriage. Aw, look at Foreman trying to actually be human and help two people who are sort of his friends. Chase bristles at the suggestion that House has control over him, and then they find a mass in Hank's bile duct. Foreman thinks it's a gallstone until they notice it's moving. It's worms! Gross!
Chase lets Hank and the wife know the (sort-of) good news: he has worms, not sclerosing cholangitis! The worms spread throughout his body and caused all of his symptoms, and were "most likely" introduced to him through sexual activity. So, look out, Mrs. Hank! And also all of Hank's co-stars! And their co-stars! Worms all over the New Jersey porn community! Chase hands him two pills that should make everything -- including his liver -- fine once more.
Chase heads for the doctors lounge to find Lucas sitting on the couch reading over Chase's notes. Chase grabs the charts away and asks him what his problem is. Lucas is worried about Cuddy, who he tells Chase is his girlfriend. "Seriously?" Chase says, not without a hint of admiration. Lucas says that if House doesn't get his team back then he'll make Cuddy miserable, and that will make Lucas miserable. So he's looking through the Cottages' charts for any information that could help the process. That's a ridiculous stretch, but whatever. He noticed that Chase is an extremely detailed note-taker -- at least, he was until about a month ago, when he almost stopped writing notes entirely. Chase blames it on getting backed up, but Lucas isn't buying it, especially since Chase is now leaving PPTH for mysterious reasons. He thinks Chase and Cameron are running away from something, and suggests that the best thing they can do is confront their problems, not run away from them, comparing it to when he finds himself face-to-face with a pitbull after sneaking into someone's backyard without, obviously, doing the proper research first. I think the best thing to do in that situation is not to let yourself be face-to-face with a pit bull in the first place. "Face the problem. That way it can't bite you in the ass," he says. No, it'll go right for the jugular instead. Shut up, Lucas. Why are you even here, anyway?