A mysterious man with no ID comes to PPTH, suffering from a respiratory attack. Foreman also comes to PPTH, suffering from needing a job really bad and having nowhere else to go. House isn"t pleased to have his former Cottage forced back on him, and sets about pranking Cuddy to get back at her. She, in turn, replaces his Vicodin with laxatives. Elsewhere in the hospital where no one has any work to do, Chase takes bets from the staff on who the next Number to get fired will be. It should be all of them, since they contribute nothing to this week"s case. Instead, House is the one who figures out the patient is suffering from Mirror Syndrome and has no idea who he really is, instead adapting the personality of whoever happens to be close by. He does a remarkably good job of this, and most of his doctors are left a little unnerved by what parts of themselves are reflected back at them. Only one of them actually learns something from it: Foreman realizes that he doesn"t hate being back at PPTH after all. And House realizes the patient is a farm equipment salesman from Whocares, Ohio, and is suffering from something related to pig poop.