Doctor Who: The Satan Pit

"The Satan Pit" is the ninth episode of series two of the 2005 relaunch of the British sci-fi series Doctor Who and the twentieth episode of the series overall. Totaling the episode count of both programs together, including the 1996 Doctor Who television movie and "The Christmas Invasion" holiday special, it is the 716th episode in the entire Doctor Who franchise. It was directed by Graeme Harper and written by Tom MacRae. It first aired on BBC One in the United Kingdom on June 10th, 2006. The episode was produced by Phil Collinson with Russell T. Davies and Julie Gardner as executive producers and Helen Vallis as associate producer.