Last updated 09 January 2020


Part Four

Series Episode Number: 491

World Premiere: Sat 18 Nov 1978 - 6:23pm GMT [BBC One] (United Kingdom)
First Broadcast: Fri 2 Feb 2001 - 10:30pm CST [Prairie Public Television]
Running Time: 23 minutes 7 seconds

7.60 Million (UK)

Appreciation Index: 67 (UK)

Chart Position: 66 () (UK)

Recorded on Mon 17 Jul 1978 in Television Centre 3



The Doctor releases two alien justice machines from imprisonment but they sentence him to death! Meanwhile, Romana searches for clues that will reveal Vivien Fay's true identity.


Production Team hide uncredited
WriterDavid Fisher
DirectorDarrol Blake
ProducerGraham Williams
DesignerJohn Stout
Script EditorAnthony Read
Costume DesignerRupert Jarvis
Make-up ArtistAnn Briggs
Visual Effects DesignerMat Irvine
Electronic EffectsA J Mitchell
Videotape EditorMalcolm Banthorpe
Studio LightingWarwick Fielding
Studio SoundRichard Chubb
OB LightingHubert Cartwright
OB SoundVic Godrich
Production AssistantCarolyn Montagu
Production Unit ManagerJohn Nathan-Turner
Incidental MusicDudley Simpson
Special SoundDick Mills
Title MusicRon Grainer (uncredited)
Assistant Floor ManagerNigel Taylor (uncredited)
Floor AssistantPeter Leslie (uncredited)
Technical ManagerBob Warman (uncredited)Info
Vision MixerNigel Finnis (uncredited)
Grams OperatorAndrew Hunter (uncredited)
Senior CameramanReg Poulter (uncredited)
Technical Manager(TM2)Bob Wade (uncredited)
OB CamermanTrevor Wimlett (uncredited)
OB CamermanMike Windsor (uncredited)
OB Scene Crew SupervisorBob Hare (uncredited)
Title Music BBC Radiophonic Workshop (uncredited)
Props BuyerRobert Fleming (uncredited)
Design AssistantCassie Pusey (uncredited)
DresserAlice Gilbert (uncredited)
DresserLiz Penbroke (uncredited)
DresserAndre Salut (uncredited)
K9 created byBob Baker (uncredited)
K9 created byDave Martin (uncredited)
Title Music ArrangerDelia Derbyshire (uncredited)
Title SequenceBernard Lodge (uncredited)