A shape-shifting embryo is discovered; Peter shares a family secret with Olivia.
Dr. House takes the case of an autistic 10-year-old who screams for no apparent reason, then House refuses to use his office after Cuddy makes a minor change.
Billy blames Eric for an online leak; Drama joins an exclusive club; Ari and Lloyd engage in sabotage.
Officer John Cooper returns to duty after recovering from surgery; Lydia helps a former informant; Ben, Sammy and Dewey chase an armed man into a school; Ben argues with an intense street cop.
Vince receives contradictory direction; Ari and Dana Gordon try to put out the flames; Turtle has a clandestine meeting.