Last updated 09 January 2020


Part Four

Series Episode Number: 477

World Premiere: Sat 25 Feb 1978 - 6:25pm GMT [BBC One] (United Kingdom)
First Broadcast: Thu 14 Feb 1980 - 5:30pm CST [WTTW 11 Chicago]
Running Time: 23 minutes 31 seconds

10.90 Million (UK)


Chart Position: 28 () (UK)

Recorded on Sun 06 Nov 1977 in TC8



As the Vardans finally fully materialise on Gallifrey, the Doctor prepares to spring his trap. But does a more deadly alien force lie behind the Vardans?


Production Team hide uncredited
WriterDavid Agnew
WriterAnthony Read (uncredited)
WriterGraham Williams (uncredited)
DirectorGerald Blake
ProducerGraham Williams
DesignerBarbara Gosnold
Script EditorAnthony Read
Costume DesignerDee Kelly
Make-up ArtistMaureen Winslade
Visual Effects DesignerRichard Conway
Visual Effects DesignerColin Mapson
Special SoundDick Mills
Film CameramanKen Westbury
Film RecordistGraham Hare
Film EditorChris Wimble
OB LightingJohn Sterling
OB SoundIan Leiper
Studio LightingMike Jefferies
Studio SoundAnthony Philpott
Production AssistantColin Dudley
Production Unit ManagerJohn Nathan-Turner
Incidental MusicDudley Simpson
Vision MixerShirley Coward (uncredited)
Grams OperatorJerry Borrows (uncredited)
Assistant Floor ManagerRomey Allison (uncredited)
Technical ManagerErrol Ryan (uncredited)
Floor AssistantRenny Tasker (uncredited)
Floor AssistantSue Williams (uncredited)
Electronic EffectsDave Chapman (uncredited)
OB LightingTommy Thomas (uncredited)
Film Camera AssistantJohn Sennett (uncredited)
Props BuyerBrenda Barker (uncredited)
K9 OperatorNigel Brackley (uncredited)
OB Engineering ManagerBob Wade (uncredited)
Engineering Co-ordinatorsTrevor Gibbs (uncredited)
Engineering Co-ordinatorsBob Newton (uncredited)
Design AssistantBob Steer (uncredited)
Assistant Costume DesignerDennis Brack (uncredited)
Assistant Costume DesignerTerrance Parker (uncredited)
Assistant Costume DesignerRichard Winter (uncredited)
GraphicsElizabeth Freeman (uncredited)
Scene CrewRon Hasler (uncredited)
GripRoy Caney (uncredited)
Senior CameramanJim Atkinson (uncredited)
Film Operations ManagerIan Brindle (uncredited)
Film OperationsR. Davies (uncredited)
Film OperationsJohn Francis (uncredited)
Film OperationsAlan Twine (uncredited)
Film Sound AssistantPatrick Quirk (uncredited)
Make-Up AssistantNorma Hill (uncredited)
Make-Up AssistantVicky Pocock (uncredited)
Director's AssistantJoy Sinclair (uncredited)
DresserSheila Parkinson (uncredited)
DresserMervyn Beazer (uncredited)
DresserMichael Chard (uncredited)
DresserSteve Cornish (uncredited)
Artist BookingNansi Davies (uncredited)
Artist BookingPhyllis Page (uncredited)
Location BookingCarol Vigurs (uncredited)
Dubbing Sound SupervisorA. Philpot (uncredited)
Music Recording Sound SupervisorD. Miller-Timmons (uncredited)
Music Recording Sound SupervisorA. Edmonds (uncredited)
Music Recording Sound SupervisorL. Gordon (uncredited)
OB CameramanDavid Goutier (uncredited)
OB CameramanAlan Hayward (uncredited)
Title MusicRon Grainer (uncredited)
Title Music ArrangerDelia Derbyshire (uncredited)
Title SequenceBernard Lodge (uncredited)
Title Music BBC Radiophonic Workshop (uncredited)