Professor Keller has created a machine that can pacify even the most dangerous of criminals. But when the Doctor and Jo arrive at Stangmoore Prison for a demonstration, things start to go terribly wrong - especially when they discover that the Doctor's old enemy the Master is responsible for the machine.
What could he possibly want from the criminals? And what connects him with an impending World Peace Conference?
|Series||Doctor Who #8|
Information was most recently updated Sun Oct 10 13:54:52 2021