Doctor Who: Carnival of Monsters (Part 4)

"Carnival of Monsters (Part 4)" is the eighth episode of series ten of the British science fiction television programme Doctor Who and the 337th episode of the series overall. It was directed by Barry Letts with a script written by Robert Holmes. It first aired on the BBC on February 17th, 1973. "Carnival of Monsters" is the second story-arc of series ten and features Jon Pertwee as the Third Doctor.