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.
Release Date: 1993-05-31
Vote Average: 10
Media Type: movie
Release Date: 2011-11-08
Vote Average: 10
Media Type: movie
