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S12E17
Apr 19, 1975 · 25 min
6.8
Tom Baker
The Doctor
Elisabeth Sladen
Sarah Jane Smith
Ian Marter
Harry Sullivan
William Marlowe
Lester
Jeremy Wilkin
Kellman
Ronald Leigh-Hunt
Commander Stevenson
David Collings
Vorus
Michael Wisher
Magrik
Christopher Robbie
Cyberleader
Alec Wallis
Warner
Cy Town
Vogan (uncredited)
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