Last updated 24 March 2024


Episode Six

Series Episode Number: 298

World Premiere: Sat 15 May 1971 - 6:12pm BST [BBC One] (United Kingdom)
First Broadcast: Mon 8 Dec 1975 - 6:30pm CST [WTTW 11 Chicago]
Running Time: 25 minutes 22 seconds

8.70 Million (UK)


Chart Position: 23 () (UK)

Recorded on Sat 03 Apr 1971 in Television Centre 3
Archive State: RSC conver



In the underground city, the Doctor and the Master confront the guardian of the Doomsday Weapon. The miners make their last move to force the colonists to leave the planet.


Production Team hide uncredited
WriterMalcolm Hulke
DirectorMichael Briant
ProducerBarry Letts
DesignerTim Gleeson
Script EditorTerrance Dicks
Studio LightingRalph Walton
Studio SoundDavid Hughes
CostumesMichael Burdle
Make-upJan Harrison
Visual Effects DesignerBernard Wilkie
Film CameramanPeter Hall
Film EditorWilliam Symon
Special SoundBrian Hodgson
Special Sound BBC Radiophonic Workshop
Incidental MusicDudley Simpson
Title MusicRon Grainer
Title Music BBC Radiophonic Workshop
Production AssistantNicholas John (uncredited)
Technical ManagerBernard Fox (uncredited)
Film Sound RecordistDerek Medus (uncredited)
Film Sound AssistantEddie Dougall (uncredited)
Film Camera AssistantAlec Curtis (uncredited)
Visual Effects AssistantIan Scoones (uncredited)
Visual Effects AssistantColin Mapson (uncredited)
Visual Effects AssistantJohn Friedlander (uncredited)
Grams OperatorGordon Phillipson (uncredited)
Vision MixerJim Stephens (uncredited)
Assistant Floor ManagerGraeme Harper (uncredited)
Floor AssistantJohn Turner (uncredited)
Director's AssistantPauline Silcock (uncredited)
Title Music ArrangerDelia Derbyshire (uncredited)
Title SequenceBernard Lodge (uncredited)
Studio SoundTony Millier