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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.
general audience, movie lovers
time travel
United Kingdom
asThe Doctor
asJo Grant
asBrigadier Lethbridge-Stewart
asCaptain Mike Yates
asSergeant Benton
asThe Master
asCaptain Chin Lee
asPrison Governor
asDr. Roland Summers
asProfessor Kettering
asCorporal Bell
asGeorge Patrick Barnham
asArthur Linwood
asChief Prison Officer Powers
asSenior Prison Officer Green
asPrison Officer
asMailer
asVosper
asFu Peng
asSenator Alcott
asCharlie
asMajor Cosworth
asFuller
asMain Gates Prisoner
asPrisoner (uncredited)
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