Last updated 24 March 2024


Part Four

Series Episode Number: 626

World Premiere: Fri 30 Mar 1984 - 6:43pm BST [BBC One] (United Kingdom)
First Broadcast: Tue 26 May 2015 - 8:30pm EDT [Retro TV]
Running Time: 25 minutes 4 seconds

7.30 Million (UK)

Appreciation Index: 67 (UK)

Chart Position: 67 () (UK)




Mestor's true plan is revealed and the Doctor's old Gallifreyan friend Azmael comes to the realisation that he has been corrupted long enough by the Gastropod leader...


Production Team include uncredited
WriterAnthony Steven
DirectorPeter Moffatt
ProducerJohn Nathan-Turner
DesignerValerie Warrender
Script EditorEric Saward
Title SequenceSid Sutton
Title SequenceTerry Handley
Costume DesignerPat Godfrey
Make-up DesignerDenise Baron
Lighting DirectorDon Babbage
Studio SoundScott Talbott
Vision MixerDiana Long
Videotape EditorHugh Parson
Technical CoordinatorAlan Arbuthnott
Camera SupervisorAlec Wheal
Visual Effects DesignerStuart Brisdon
Video EffectsDave Chapman
Production ManagerMichael A Treen
Production AssociateJune Collins
Production AssistantChristine Fawcett
Assistant Floor ManagerStephen Jeffery-Poulter
Assistant Floor ManagerBeth Millward
Title MusicRon Grainer
Incidental MusicMalcolm Clarke
Special SoundDick Mills
Special Sound BBC Radiophonic Workshop
Film CameramanJohn Baker
Film EditorIan McKendrick
Film CameramanJohn Walker