Last updated 18 August 2023


Part Two

Series Episode Number: 501

World Premiere: Sat 27 Jan 1979 - 6:27pm GMT [BBC One] (United Kingdom)
First Broadcast: Fri 4 May 2001 - 10:30pm CDT [Prairie Public Television]
Running Time: 23 minutes 56 seconds

8.80 Million (UK)


Chart Position: 49 () (UK)

Recorded on Mon 06 Nov 1978 in Television Centre 3



The Marshal demands that the Doctor devise the ultimate deterrent against the attacking Zeons. But who are the Zeons? The Doctor and Romana begin to suspect that the Marshal is being manipulated.


Characters hide uncredited
Doctor WhoTom Baker
RomanaMary Tamm
MarshalJohn Woodvine
Princess AstraLalla Ward
ShappDavyd Harries
MerakIan Saynor
Voice of K-9John Leeson
GuardHarry Fielder
Technician (Armageddon Factor)Peter Bithiel (uncredited)
Technician (Armageddon Factor)Constance Carling (uncredited)
Guard (Armagaddon Factor)Peter Eaton (uncredited)
Technician (Armageddon Factor)Gary Dean (uncredited)
Technician (Armageddon Factor)Bill Hughes (uncredited)
Guard (Armagaddon Factor)Tony O'Leary (uncredited)
Technician (Armageddon Factor)David Wilde (uncredited)
Guard (Armagaddon Factor)Reg Turner (uncredited)
Technician (Armageddon Factor)Malcolm Ross (uncredited)
Guard (Armagaddon Factor)Richard Sheekey (uncredited)
Guard (Armagaddon Factor)Peter Roy (uncredited)
Guard (Armagaddon Factor)Barry Summerford (uncredited)
Mute (ArmagaddonFactor)Ridgewell Hawkes (uncredited)