by Hal Erickson
synopsis
In the fourth episode of the six-part story "The Reign of Terror," the Doctor (William Hartnell), still impersonating the Superintendent of Parisian Prisons, comes face to face with "the architect of the Revolution," the dreaded Robespierre (Keith Anderson). Meanwhile, with the help of underground leader Jules Renan (Donald Morley), Barbara (Jacqueline Hill), and Susan (Carole Ann Ford) are reunited with Ian (William Russell). Alas, all three of the Doctor's companions fall into a trap set by a traitor within the Underground. Written by Dennis Spooner, "The Tyrant of France" first aired on August 29, 1964; this episode apparently no longer exists.