Doctor Who: The Tenth Planet (Part 3)

"The Tenth Planet (Part 3)" is the seventh episode of season four of the British science fiction television series Doctor Who, and the 133rd episode of the series overall. It is the third chapter in the four-part "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 22nd, 1966.