Synopsis: In the fourth episode of the six-part story "Colony in Space," the Doctor (Jon Pertwee) discovers that the natives of the planet Uxarius have deified a machine which is capable of wiping out entire planets. Likewise taking an interest in this doomsday device is the Master (Roger Delgado), who has arrived on Uxarius in the guise of a land-dispute me...
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Starring: Katy Manning, Nicholas Pennell, Jon Pertwee, Roger Delgado