Overview

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.

Genres

Cast

Tom Baker

The Doctor

Mary Tamm

Romana

John Leeson

K-9 (voice)

John Woodvine

Marshal

Lalla Ward

Princess Astra

Davyd Harries

Shapp

Susan Skipper

'Heroine'

John Cannon

Guard

Pat Gorman

Pilot

William Squire

The Shadow

Barry Jackson

Drax

Valentine Dyall

The Black Guardian