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.
Tom Baker
Doctor Who
Elisabeth Sladen
Sarah Jane Smith
Ian Marter
Harry Sullivan
Ronald Leigh-Hunt
Commander Stevenson
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May 10, 1975
1h 40m
5.7
Michael E. Briant
Gerry Davis, Robert Holmes
BBC
GB
William Marlowe
Lester
Kevin Stoney
Tyrum
David Collings
Vorus
Alec Wallis
Warner
Michael Wisher
Magrik
Christopher Robbie
Cyber-Leader
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