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The Doctor, Ace, K9 and Cedric are taking part in a game show to see who can win The Ultimate Challenge — the biggest game show in the universe. The contestants are forced to answer fairly basic questions about space, with severe punishments if they get it wrong.
Top Cast
Sylvester McCoy as The Doctor
Sophie Aldred as Ace
Stephen Johnson as Cedric
John Leeson as K9 (voice)
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