Last updated 24 March 2024


Part Four

Series Episode Number: 385

World Premiere: Sat 18 Jan 1975 - 5:31pm GMT [BBC One] (United Kingdom)
First Broadcast: Fri 29 Feb 1980 - 5:30pm CST [WTTW 11 Chicago]
Running Time: 24 minutes 29 seconds

9.00 Million (UK)

Appreciation Index: 51 (UK)

Chart Position: 30 () (UK)

Recorded on Fri 07 Jun 1974 in TC3 / 7



The Doctor races to avert a nuclear holocaust. The robot, distraught over killing its creator, takes Sarah hostage and goes on a rampage.

Characters hide uncredited
Doctor WhoTom Baker
Sarah Jane SmithElisabeth Sladen
Harry SullivanIan Marter
Brigadier Lethbridge-StewartNicholas Courtney
Sergeant BentonJohn Levene
Miss WintersPatricia Maynard
RobotMichael Kilgarriff
Professor KettlewellEdward Burnham
JellicoeAlec LinsteadInfo
(extra)Ray Knight (uncredited)
(extra)Allan Hinton (uncredited)
(extra)Allan Bioini (uncredited)
(extra)Bill Bingham (uncredited)
(extra)Brian Fellows (uncredited)
(extra)Christopher Carrington (uncredited)
(extra)Colin Hamilton (uncredited)
(extra)David Parker (uncredited)
(extra)David Patterson (uncredited)
(extra)Douglas Read (uncredited)
(extra)Fred Garratt (uncredited)
(extra)George Bayliss (uncredited)
(extra)Gordon Wall (uncredited)
(extra)Jack Parker (uncredited)
(extra)John Milner (uncredited)
(extra)Norman Colson (uncredited)
(extra)Norman Littlejohns (uncredited)
(extra)Peter Isley (uncredited)
(extra)Raymond Savage (uncredited)
(extra)Richard Martin (uncredited)
(extra)Roger Squires (uncredited)
(extra)Steve Rivers (uncredited)
Production Teamhide uncredited
WriterTerrance Dicks
DirectorChristopher Barry
ProducerBarry Letts
DesignerIan Rawnsley
Script EditorRobert Holmes
Costume DesignerJames Acheson
MakeupJudy Clay
Visual Effects DesignerClifford Culley
SoundTrevor Webster
SoundVic Godrich
LightingNigel Wright
LightingJohn Mason
Incidental MusicDudley Simpson
Special SoundDick Mills
Production AssistantPeter Grimwade
Production Unit ManagerGeorge Gallaccio
Title MusicRon Grainer
and BBC Radiophonic Workshop
Title SequenceBernard Lodge
Assistant Floor ManagerDavid Tilley (uncredited)
Title Music ArrangerDelia Derbyshire (uncredited)
Director's AssistantJoy Sinclair (uncredited)
Technical Manager (TM2)Derek Thompson (uncredited)
Grams OperatorGordon Phillipson (uncredited)
Vision MixerFred Law (uncredited)
Floor AssistantGeoffrey Posner (uncredited)
Inlay OperatorDave Jervis (uncredited)