The Reign of Terror is the eighth serial in the British science fiction television series Doctor Who, which was first broadcast on BBC1 in six weekly parts from 8 August to 12 September 1964. It was written by Dennis Spooner and directed by Henric Hirsch. In the serial, the First Doctor (William Hartnell), his granddaughter Susan (Carole Ann Ford), and teachers Ian Chesterton (William Russell) and Barbara Wright (Jacqueline Hill) arrive in France during the period of the French Revolution known as the Reign of Terror, where they become involved with prisoners and English spies.