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Jon Pertwee
The Doctor
Caroline John
Liz Shaw
Nicholas Courtney
Brigadier Lethbridge-Stewart
Ronald Allen
Ralph Cornish
John Abineri
Carrington
Robert Cawdron
Taltalian
Michael Wisher
John Wakefield
Cheryl Molineaux
Miss Rutherford
Ray Armstrong
Grey
Robert Robertson
Collinson
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Released
BBC
Barry Letts
Producer
Michael Ferguson
Director
David Whitaker
Writer
Dudley Simpson
Original Music Composer
