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

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Main Cast: Jon Pertwee, Katy Manning, Roger Delgado, Vera Fusek, Michael Hawkins, Peter Birrel, Lawrence Davidson, Timothy Craven, Ray Lonnen, Barry Ashton

Directors: Paul Bernard, David Maloney

Writer: Malcolm Hulke

Editor: John Bush

Cinematographer:

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