Last updated 24 March 2024


Part Two

Series Episode Number: 383

World Premiere: Sat 4 Jan 1975 - 5:32pm GMT [BBC One] (United Kingdom)
First Broadcast: Wed 27 Feb 1980 - 5:30pm CST [WTTW 11 Chicago]
Running Time: 25 minutes

10.70 Million (UK)

Appreciation Index: 53 (UK)

Chart Position: 17 () (UK)

Recorded on Wed 22 May 1974 in TC3



Using the deadly disintegrator weapon, the robot steals the destructor codes. Harry Sullivan is sent to infiltrate Think Tank to discover the truth.


Production Team hide uncredited
WriterTerrance Dicks
DirectorChristopher Barry
ProducerBarry Letts
DesignerIan Rawnsley
Script EditorRobert Holmes
Costume DesignerJames Acheson
Make-upJudy Clay
Visual Effects DesignerClifford Culley
SoundJohn Lloyd
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)