Plot
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.
Writer | Bob Baker |
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Director | Michael Hayes |
Actor | Tom Baker, Mary Tamm, John Leeson |
Country | United Kingdom |
Production | BBC |