Lights Out is the twentieth episode of Season 2 of The Brady Bunch, and the 45th overall episode of the series. Written by Bruce Howard, and directed by Oscar Rudolph, it first aired 19 February 1971 on ABC.
Cindy becomes afraid of the dark when she sees a magician's "disappearing lady" act, so Peter tries to help by asking her to be his assistant for his own magic show, where the highlight is the same trick.
A terrified Cindy is having trouble sleeping with the lights off as she is scared of a magician's "disappearing lady" trick she saw at a friend's party. The lady disappeared and Cindy, who ran off since she was too frightened, didn't see the lady reappear. Peter, on the other hand, was so excited by the magic act that he wants to audition for the school's vaudeville show as a magician. Mike believes that Peter's act can help Cindy by showing her how magic is really performed. Peter even asks an excited Cindy to be his assistant for the show. But when it comes time to rehearse the disappearing lady act, Cindy once again gets frightened. The whole thing is nearly undermined when Bobby plays a cruel joke on her. When Peter's new assistant, Jan, hurts herself in gym class, his goal of making the vaudeville show line-up may be jeopardized, unless Cindy believes in the old adage that the show must go on.