The TARDIS materialises not far from Paris in 1794 — one of the bloodiest years following the French Revolution of 1789. The travellers become involved with an escape chain rescuing prisoners from the guillotine and get caught up in the machinations of an English undercover spy, James Stirling — alias Lemaitre, governor of the Conciergerie prison.
William Hartnell
as The Doctor
Carole Ann Ford
as Susan Foreman
Jacqueline Hill
as Barbara Wright
William Russell
as Ian Chesterton
Keith Anderson
as Robespierre
Jack Cunningham
as Jailer
Jeffry Wickham
as Webster
Neville Smith
as D'Argenson
Laidlaw Dalling
as Rouvray
Peter Walker
as Small Boy
James Cairncross
as Lemaitre
Roy Herrick
as Jean
