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Arriving on Space Station Nerva in its distant past, the Doctor, Sarah and Harry find its crew threatened by a mysterious plague. Discovering that things are not as they seem, they uncover a Cyberman plot to destroy Voga, planet of gold.
Directed by Michael E. Briant
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Tom Baker
Doctor Who
Elisabeth Sladen
Sarah Jane Smith
Ian Marter
Harry Sullivan
Ronald Leigh-Hunt
Commander Stevenson
William Marlowe
Lester
Kevin Stoney
Tyrum
David Collings
Vorus
Alec Wallis
Warner
Michael Wisher
Magrik
Christopher Robbie
Cyber-Leader
Melville Jones
First Cyberman
Brian Grellis
Seprah
Planet of the Apes
1968
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