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The Doctor and Romana learn the second segment of the Key to Time is on the planet Calufrax. Yet they arrive on a planet called Zanak, which has been hollowed out and fitted with hyperspace engines, allowing its insane, half-robot Captain to materialise it around smaller planets and plunder their resources.
Release: Oct 21, 1978
Runtime: 100 minutes
Language: English
Studio: BBC
Country: United Kingdom