Last updated 24 March 2024


Part Nine

Series Episode Number: 648

World Premiere: Sat 1 Nov 1986 - 5:47pm GMT [BBC One] (United Kingdom)
First Broadcast: Sun 11 Dec 1988 - 11:00pm CST [WTTW 11 Chicago]
Running Time: 24 minutes 56 seconds

5.20 Million (UK)

Appreciation Index: 66 (UK)

Chart Position: 85 () (UK)

Recorded on Wed 16 Jul 1986 in Television Centre 1



The Doctor and Mel are taking a rest aboard the Hyperion III when a series of murders lead them to suspect there is more to Professor Laskey's party than initially appears.


Production Team hide uncredited
WriterPip Baker
WriterJane Baker
DirectorChris Clough
ProducerJohn Nathan-Turner
DesignerDinah Walker
Costume DesignerAndrew Rose
Make-up DesignerShaunna Harrison
Studio LightingDon Babbage
Studio SoundBrian Clark
Vision MixerShirley Coward
Videotape EditorHugh Parson
Technical CoordinatorAlan Arbuthnott
Camera SupervisorAlec Wheal
Visual Effects DesignerKevin Molloy
Video EffectsDanny Popkin
Production AssistantJane Wellesley
Assistant Floor ManagerKaren Little
Production ManagerIan Fraser
Production AssociateJune Collins
Production AssociateJenny Doe
Incidental MusicMalcolm Clarke
Special SoundDick Mills
Special Sound BBC Radiophonic Workshop
Title MusicRon Grainer (uncredited)
Script EditorJohn Nathan-Turner (uncredited)
Title Music ArrangerDominic Glynn (uncredited)
Title SequenceSid Sutton (uncredited)
Title SequenceTerry Handley (uncredited)