Ηθοποιοί επεισοδίου
Jon PertweeThe Doctor
Katy ManningJo Grant
William HartnellThe Doctor
Patrick TroughtonThe Doctor
Nicholas CourtneyThe Brigadier
John LeveneSergeant Benton
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Rex RobinsonDr. Tyler
Roy PurcellPresident of the Council
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Clyde PollittChancellor
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Graham LeamanTime Lord
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Denys PalmerCorporal Palmer
Stephen ThorneOmega
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Laurie WebbMr. Ollis