10.00pm wednesday / AUGUST 20

When Joe, a policeman is admitted to hospital with a gun shot wound and a permanent case of the giggles, House dispatches Foreman to investigate Joe's house for any possible causes of this unknown medical condition. But whatever the cause is, lurks in Joe's apartment, causing Foremen to be exposed to the unknown elements. Now House, Cameron and Chase are forced to fight for two lives – both men with a condition undiagnosed and untreatable.

House bans Cameron from revisiting Joe's apartment in the fear she will pick up the infected elements, but in a desperate bid to save his life, Foreman stabs Cameron with an infected needle, forcing her to revisit the apartment in a bid to save her life as well.