In the 26th century, the Doctor and Jo uncover a plot by the Master to provoke an interplanetary war between Earth and Draconia.
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)
