Doctor Who: The Tenth Planet (Part 4)

"The Tenth Planet (Part 4)" is the eighth episode of season four of the British science fiction television series Doctor Who, and the 134th episode of the series overall. It is the final chapter in "The Tenth Planet" story-arc, which is the twenty-ninth storyline from the series. It was directed by Derek Martinus with a script written by Kit Pedler and Gerry Davis. It first aired in the United Kingdom on BBC One on October 29th, 1966.

Notes & Trivia

 * This is the final regular appearance of William Hartnell as the First Doctor. He regenerates in this episode.


 * This is the first appearance of Patrick Troughton as the Second Doctor.