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
Katy Manning
Roger Delgado
Vera Fusek
Michael Hawkins
Peter Birrel
Lawrence Davidson
Timothy Craven
Ray Lonnen
Barry Ashton
John Rees
James Culliford
Louis Mahoney
Roy Pattison
Karol Hagar
Harold Goldblatt
Madhav Sharma
Dennis Bowen
Richard Shaw
Luan Peters
Caroline Hunt
Bill Wilde
John Woodnutt
Ian Frost
Clifford Elkin
Stephen Thorne
Michael Kilgarriff
Rick Lester
Ramsay Williams
Michael Wisher
Stanley Price
Laurence Harrington