Doctor Who: The Armageddon Factor
2h 30m·Action, Adventure, Drama
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.
| Actor | Role |
|---|---|
 Tom BakerThe Doctor | The Doctor |
 Mary TammRomana | Romana |
 John LeesonK-9 (voice) | K-9 (voice) |
 John WoodvineMarshal | Marshal |
 Lalla WardPrincess Astra | Princess Astra |
 Davyd HarriesShapp | Shapp |
| IIan SaynorMerak | Merak |
| IIan Liston'Hero' | 'Hero' |
 Susan Skipper'Heroine' | 'Heroine' |
 John CannonGuard | Guard |
| IIain ArmstrongTechnician | Technician |
 Pat GormanPilot | Pilot |
| HHarry FielderGuard | Guard |
 William SquireThe Shadow | The Shadow |
 Barry JacksonDrax | Drax |
 Valentine DyallThe Black Guardian | The Black Guardian |