"42" is the seventh episode of the third series of British science fiction television series Doctor Who. It was first broadcast on BBC One on 19 May 2007. It was the first episode written by future showrunner Chris Chibnall. In the episode, the cargo spaceship SS Pentallian is on a crash course with the living star its crew ripped out a part of for cheap fuel. On board the ship, the star possesses and attacks the Pentallian crewmembers one by one for doing this.