This Week in USA
The Sontaran Experiment: Part One
Last updated 08 January 2017
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Featuring: Tom Baker, Ian Marter, Elisabeth Sladen, Kevin Lindsay
The Doctor, Harry and Sarah find Earth is a desolate wilderness. They meet a group of stranded human colonists who are being hunted by a robot and experimented upon by its master.
Synopsis Source: Doctor Who Guide
Broadcast Source: BroaDWcast