The final segment of the Key is traced to the planet Atrios, engaged in a long war with the neighboring Zeos. The Doctor and Romana discover that Zeos is deserted and the war is being coordinated by a computer called Mentalis, which is under the control of the Shadow, an agent of the Black Guardian. The Doctor prevents the Marshal of Atrios from destroying Zeos and discovers the sixth and final segment. But will he give up the completed Key? Part 5 of 6.
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Amazon Video on Demand
Length: 25:00 Posted: 3/25/2008
