Doctor Who: The Armageddon Factor (1979)

Director: Michael Hayes

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

The Doctor

Mary Tamm

Romana

John Leeson

K-9 (voice)

John Woodvine

Marshal

Lalla Ward

Princess Astra

Davyd Harries

Shapp

Ian Saynor

Merak

Ian Liston

'Hero'

Susan Skipper

'Heroine'

John Cannon

Guard