Doctor Who: The Armageddon Factor (24/02/1979)

Production : BBC

Synopsis

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.

Tom Baker

Mary Tamm

John Leeson

John Woodvine