“The Reign of Terror” is the last adventure of the first season of “Doctor Who” classic series, which aired in 1964 featuring the First Doctor, Ian, Barbara and Susan. It follows “The Sensorites” and it’s a six parts adventure written by Dennis Spooner and directed by Henric Hirsch.

The First Doctor (William Hartnell), Susan (Carole Ann Ford), Ian (William Russell) and Barbara (Jacqueline Hill) arrive on Earth. They hoped to be back in London in the present of the two teachers, but after a brief exploration, they realize to be in France at the time of the infamous reign of terror.

The contact with local leads to separation of the Doctor from the rest of the group. Ian, Barbara and Susan are mistaken for counter-revolutionaries and taken to Paris, where they are imprisoned. If they can’t quickly find a way to escape from the prison they’ll be guillotined!