Discover
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
John Rees
Hardy
James Culliford
Stewart
Louis Mahoney
Newscaster
Roy Pattison
Draconian space pilot
Karol Hagar
Secretary
Harold Goldblatt
Professor Dale
Madhav Sharma
Patel
Dennis Bowen
Prison Governor
Richard Shaw
Cross
Luan Peters
Sheila
Caroline Hunt
Technician
Bill Wilde
Draconian captain
John Woodnutt
Draconian Emperor
Ian Frost
Draconian messenger
Clifford Elkin
Earth cruiser captain
Stephen Thorne
First Ogron
Michael Kilgarriff
Second Ogron
Rick Lester
Third Ogron
Ramsay Williams
Congressman Brook
Michael Wisher
Dalek (voice)
Stanley Price
Pilot
Laurence Harrington
Lunar guard
Art
Cynthia Kljuco
Production Design
Camera
John Tiley
Camera Operator
Crew
Dick Mills
Special Sound Effects
Editing
John Bush
Editor
Lighting
Ralph Walton
Lighting Director
Sound
Dudley Simpson
Original Music Composer
Brian Hiles
Sound
Delia Derbyshire
Theme Song Performance
Art
Cynthia Kljuco
Production Design
Camera
John Tiley
Camera Operator
Crew
Dick Mills
Special Sound Effects
Editing
John Bush
Editor
Lighting
Ralph Walton
Lighting Director
Sound
Dudley Simpson
Original Music Composer
Brian Hiles
Sound
Delia Derbyshire
Theme Song Performance