Doctor Who: The Mind of Evil

Plot Summary

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.

Top Cast

Jon Pertwee The Doctor

Katy Manning Jo Grant

Nicholas Courtney Brigadier Lethbridge-Stewart

Richard Franklin Captain Mike Yates

John Levene Sergeant Benton