Description

The final segment of the Key to Time is at the heart of a devastating war between neighbouring planets Atrios and Zeos. The Fourth Doctor discovers that a sinister entity is manipulating events and the cost of obtaining the final segment may be more personal than he imagined.

Cast

Tom Baker

Mary Tamm

John Leeson

John Woodvine

Lalla Ward

Davyd Harries

Susan Skipper

John Cannon

Pat Gorman

William Squire

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