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Jon Pertwee
The Doctor
Katy Manning
Jo Grant
Roger Delgado
The Master
Vera Fusek
President of Earth
Michael Hawkins
General Williams
Peter Birrel
Draconian Prince
Lawrence Davidson
Draconian First Secretary (uncredited)
Timothy Craven
Cell guard (uncredited)
Ray Lonnen
Gardiner
Barry Ashton
Kemp
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Released
BBC
Paul Bernard
Director
David Maloney
Malcolm Hulke
Writer
Cynthia Kljuco
Production Design
