출연진
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