Who's Your Daddy

House's ex-bandmate brings in a 16 year old girl Katrina victim, whom he recently just found out was his daughter, because she has been suffering hallucinations about the catastrophe. House is convinced the girl is trying to scam his friend and must work through the girl's lies to try and figure out what is truly wrong with her. Meanwhile, House is asked by Cuddy to review two medical files and discovers she is looking for a sperm donor.