House was not lying when he said that bedroom was a shrine to CTB. There are pictures of her all over the place. Some with Wilson, posing awkwardly as he does. Were they even together that long to have this many pictures? Is that her PPTH security badge on the shelf? Makes sense they wouldn't have taken it away from her after she was fired, since the PPTH security team is just that terrible. Suddenly, House hears whispering. At least, I think it's whispering. It's kind of hard to tell since the ominous music on the soundtrack is so loud and drones a lot of it out. He turns his light on and it stops. Even so, he walks into Wilson's room unannounced, apparently hoping to catch him whispering or listening to the radio of something that would explain the sound. Wilson is lying in bed silently until he asks House what's up. House claims he's fine and goes back to bed. As soon as he turns the light off, the whispering starts again. Just sleep with the light on until Halloween is over, House. Or until you can find a way to convince your friend to take down all the CTB photos that are clearly having an effect on you.
The next morning, the Cottages enter the meeting room and exposit that they didn't find any consistent genetic mutations in Donny's dead paternal line, but now they have a living relative to test in his son. House, meanwhile, has written them a double-post-it note saying he's on medical rounds because this patient is even more of a waste of his time than they are. Foreman tells Cameron to skip taking a blood sample from Donny's son and go for the "most pure" DNA source, which also happens to be the most painful -- the bone marrow.
Guess what? Son of Donny has no interest in some painful bone marrow biopsy to diagnose a condition he doesn't have to worry about for another thirty years. Cameron pulls Mom outside to talk to her about stuff that has nothing to do with medical treatment, encouraging her to tell Donny's son about his father. "I've been lying to him his whole life. What's he gonna think of me?" Mom says. I guess you should have thought of that before you lied to your son for his whole life, Mom. Cameron urges Mom to do it anyway, pointing out that if Donny is right and does die soon, this could be his son's only chance to meet the father who didn't want him in the first place.