Sci-Fi 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
Written by
Don Houghton
Jon Pertwee
The Doctor
Pik-Sen Lim
Captain Chin Lee
Patrick Godfrey
Major Cosworth
Roger Delgado
The Master
Nicholas Courtney
Brigadier Lethbridge-Stewart
Katy Manning
Jo Grant
Michael Sheard
Dr. Roland Summers
Tommy Duggan
Senator Alcott
Neil McCarthy
George Patrick Barnham
Richard Franklin
Captain Mike Yates
John Levene
Sergeant Benton
William Marlowe
Mailer
Kristopher Kum
Fu Peng
Raymond Westwell
Prison Governor
Simon Lack
Professor Kettering
Fernanda Marlowe
Corporal Bell
Clive Scott
Arthur Linwood
Roy Purcell
Chief Prison Officer Powers
Eric Mason
Senior Prison Officer Green
Bill Matthews
Prison Officer
Barry Wade
Prison Officer
Dave Carter
Prison Officer
Martin Gordon
Prison Officer
Hayden Jones
Vosper
David Calderisi
Charlie
Johnny Barrs
Fuller
Matthew Walters
Main Gates Prisoner

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