The 601st episode of Doctor Who airs on BBC1. Anthony Ainley guest stars as the Master, and the episode introduces a robotic companion intended to be portrayed by a real robot, Kamelion. Kamelion’s designer dies prior to production, however, leaving minimal documentation for the robot’s operation; Kamelion’s further appearances are written out of the show and the robot only makes one further appearance. This brings Doctor Who’s 20th season to a close; the 20th anniversary special, The Five Doctors, airs later in the year as a stand-alone with a budget and production schedule separate from the rest of the season’s episodes.

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