House M.D. Season 7 Episode 22

Thirteen's ex-con friend, Darrien, arrives at Thirteen's apartment unannounced and in need of urgent medical attention. When she finds out that her friend has relapsed into drug use, Thirteen promises not to take her to the hospital where the cops could find her and instead turns to Chase in desperation. Meanwhile, House deals with devastating information, and Taub begins to come to terms with surprising news.