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.
Casts:
Tom Baker
Mary Tamm
John Leeson
John Woodvine
Lalla Ward
Davyd Harries
Ian Saynor
Ian Liston
