Doing an MRI on himself, House sees the same sort of tumors in his right leg that killed the rats. Intending to remove them himself proves a little too much even for House.
The episode deals with unreasonable (or perhaps reasonable) fear in all three stories; each of the characters has to address deep seated (and sometimes irrational) fears, some going back months; some years. Most significantly, we gain a new understanding of House, one that cuts to the core of his pathology and his deepest fears.
I will tell you that the tension is unrelenting and there are two scenes that misted my eyes. There are important moments for five of the series regular characters, including one dormant story thread that makes an unexpected (and very welcome) reappearance in the fabric of this excellent episode.
I have to warn you, the episode is very, very graphic in parts—almost unwatchable for a couple moments, so be prepared. I wish I could tell you more, but I can’t.
In the meantime, enjoy clips from Monday night's show, which airs 8PM ET. And if you haven't, please check out my interview with House executive producer Katie Jacobs.