After a month and a half, House is finally back. On tonight's episode, a drug dealer mysteriously collapses while negotiating a sale, and his partner-in-crime takes him to Princeton Plainsboro for treatment. But since they're, well, drug dealers, they're not too keen about divulging some personal information. So the team has no choice but to do what the old House team would do - old-fashioned detective work!

Also on "The Down Low" House (Hugh Laurie) and Wilson (Robert Sean Leonard) compete for the affection of a new neighbor (Sasha Alexander, while Chase (Jesse Spencer), Thirteen (Olivia Wilde), and Taub (Peter Jacobson) attempt to play a practical joke on Foreman (Omar Epps). Where is Cuddy (Lisa Edelstein) and Lucas?