Time itself is in peril! The Time Lords and UNIT find themselves besieged by a mythic figure from the Time Lords' past hell-bent on destruction. The only way to defeat him is to break the First Law of Time and let the Doctor help himself — literally...
Directed by Lennie Mayne
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Cast
Jon Pertwee
The Doctor
Patrick Troughton
The Doctor
William Hartnell
The Doctor
Katy Manning
Jo Grant
Nicholas Courtney
Brigadier Lethbridge-Stewart
John Levene
Sergeant Benton
Stephen Thorne
Omega
Rex Robinson
Doctor Tyler
Roy Purcell
President of the Council
Laurie Webb
Mr. Ollis
Clyde Pollitt
Chancellor
Graham Leaman
Time Lord
Patricia Prior
Mrs. Ollis
Denys Palmer
Corporal Palmer
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