Doctor Who: Invasion of the Dinosaurs (Part 4)

"Invasion of the Dinosaurs (Part 4)" is the eighth episode of season eleven of the British science fiction television series Doctor Who and the 359th episode of the series overall. It is the fourth and final installment in "The Time Warrior" serial. It was directed by Alan Bromly and written by Robert Holmes. It was produced by Barry Letts and first aired on BBC One on February 2nd, 1974.