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.
Tom Baker
Mary Tamm
John Leeson
Bruce Purchase
Andrew Robertson
Rosalind Lloyd
David Warwick
David Sibley
Ralph Michael
Primi Townsend
Doctor Who: The Invisible Enemy
Doctor Who: Image of the Fendahl
Doctor Who: The Sun Makers
Doctor Who: Underworld
Doctor Who: The Invasion of Time
Doctor Who: The Stones of Blood
Doctor Who: Castrovalva
Doctor Who: Time-Flight
Doctor Who: Arc of Infinity
Duckweed
Doctor Who: Terminus
Doctor Who: The King's Demons
Doctor Who: Kinda
Doctor Who: Warriors of the Deep
Meet the Robinsons
Doctor Who: Full Circle
Doctor Who: State of Decay
Doctor Who: Warriors' Gate
Doctor Who: The Keeper of Traken
Doctor Who: Logopolis
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