Last updated 24 March 2024


Part Four

Series Episode Number: 557

World Premiere: Tue 12 Jan 1982 - 7:05pm GMT [BBC One: Not Wales] (United Kingdom)
First Broadcast: Thu 9 Apr 2015 - 8:30pm EDT [Retro TV]
Running Time: 24 minutes 12 seconds

10.40 Million (UK)


Chart Position: 46 () (UK)

Recorded on Wed 30 Sep 1981 in Television Centre 3



As recursive occlusion threatens to destroy everything and everyone in Castrovalva, the Master's space/time trap is revealed, with Adric at its heart...

Characters hide uncredited
The DoctorPeter Davison
TeganJanet Fielding
NyssaSarah Sutton
AdricMatthew Waterhouse
The MasterAnthony Ainley
ShardovanDerek Waring
MergraveMichael Sheard
RutherFrank Wylie
TownsmanDavid Bulbeck (uncredited)
TownsmanDavid Payne (uncredited)
TownsmanGeorge Ballantine (uncredited)
TownsmanGiles Melville (uncredited)
TownsmanJames Gregory (uncredited)
TownsmanMalcolm Ross (uncredited)
TownsmanMike Vinden (uncredited)
TownswomanDelphine Auchterlonie (uncredited)
TownswomanDoreen Croft (uncredited)
TownswomanDorothy Grumbar (uncredited)
TownswomanHelen Hembrough (uncredited)
TownswomanIlana Barry (uncredited)
TownswomanJean Channon (uncredited)
TownswomanJenny Piper (uncredited)
TownswomanJune Parkhurst (uncredited)
TownswomanLucy Gwynn (uncredited)
TownswomanLynn Austin (uncredited)
TownswomanMaureen Stevens (uncredited)
TownswomanRosemary Smith (uncredited)
TownswomanSally Gardiner (uncredited)
TownswomanSheila Vivian (uncredited)
TownswomanValerie Needham (uncredited)
WarriorColin Cook (uncredited)
WarriorDavid Harrison (uncredited)
WarriorErnie Goodyear (uncredited)
WarriorMark Allington (uncredited)
WarriorRay Martin (uncredited)
Production Teamhide uncredited
WriterChristopher H Bidmead
DirectorFiona Cumming
ProducerJohn Nathan-Turner
DesignerJanet Budden
Script EditorEric Saward
Title SequenceSid Sutton
Costume DesignerOdile Dicks-Mireaux
Makeup ArtistMarion Richards
Studio LightingRon Bristow
Studio SoundLaurie Taylor
Technical Manager (TM2)Clive Gulliver
Senior CameramanAlec Wheal
Videotape EditorRod Waldron
Visual Effects DesignerSimon McDonald
Video EffectsDave Chapman
Vision MixerCarol Johnson
Film CameramanJohn Baker
Film SoundJim McAlister
Film EditorRobin Jackman
Production ManagerMargot Hayhoe
Production AssociateAngela Smith
Production AssistantOlivia Cripps
Assistant Floor ManagerRenny Tasker
Incidental MusicPaddy Kingsland
Special SoundDick Mills
Grams OperatorJohn Downes (uncredited)
Studio EngineerDan Shaw (uncredited)
Floor AssistantSarah Woodside (uncredited)
Show Working SupervisorDon Evans (uncredited)
Lighting ChargehandJohn Morin (uncredited)
Visual Effects AssistantMalcolm James (uncredited)
Visual Effects AssistantRon Thornton (uncredited)
Props BuyerHelen Mackenzie (uncredited)
Film Camera AssistantPaul Roy (uncredited)
Film Sound AssistantGordon Lester (uncredited)
Film LightingTed Turpin (uncredited)
Film 0perations ManagerGraham Richmond (uncredited)
Film OperationsJohn McEroy (uncredited)
Film OperationsDick Norwood (uncredited)
Film OperationsDicky Rickes (uncredited)
Film OperationsJohn Shayer (uncredited)
Film OperationsBrian Simmons (uncredited)
Film OperationsBrian Water (uncredited)
GripJimmy Monks (uncredited)
Design AssistantRod McLean (uncredited)
Makeup (Assistant)Lesley Bond (uncredited)
Makeup (Assistant)Sula Loizoo (uncredited)
Makeup (Assistant)Marilyn MacDonald (uncredited)
Makeup (Assistant)Charlotte Norman (uncredited)
Makeup (Assistant)Lucy Wiles (uncredited)
DresserAlison Cowles (uncredited)
DresserLiz Dixon (uncredited)
DresserRay Greenhill (uncredited)
DresserTim Williamson (uncredited)
Booking AssistantSheila Hodges (uncredited)
Artist BookingSarah Bird (uncredited)
Location CateringFreeman Poole (uncredited)
Production SecretaryFiona Duncan (uncredited)
Production SecretaryJane Judge (uncredited)
Title MusicRon Grainer (uncredited)
Title Music ArrangerPeter Howell (uncredited)
Nyssa created byJohnny Byrne (uncredited)