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Jon Pertwee
The Doctor
Caroline John
Liz Shaw
Nicholas Courtney
Brigadier Lethbridge-Stewart
Hugh Burden
Channing
Hamilton Dyce
Major General Scobie
Antony Webb
Dr. Henderson
Neil Wilson
Seeley
Talfryn Thomas
Mullins
John Breslin
Captain Munro
John Woodnutt
Hibbert
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Released
BBC
Derek Martinus
Director
Robert Holmes
Writer
Derrick Sherwin
Producer
Bill Symon
Editor
