Doctor Who: The Mind of Evil (7.5)

Movie · 1971 · 2 h 30 min · Science Fiction, Drama, Adventure

Professor Emil Keller has created a machine that can pacify even the most dangerous of criminals. But when the Doctor and Jo arrive at Stangmoor Prison for a demonstration, things start to go horribly wrong - especially when they discover that the Doctor's old enemy the Master is responsible for the machine.

Directed by: Timothy Combe

Starring Jon Pertwee, Katy Manning, Nicholas Courtney, Richard Franklin, John Levene, Roger Delgado, Pik-Sen Lim, Raymond Westwell, Michael Sheard, Simon Lack

We don't know where to watch it in the US.