Last updated 24 March 2024


Episode Four

Series Episode Number: 333

World Premiere: Sat 20 Jan 1973 - 5:51pm GMT [BBC One] (United Kingdom)
First Broadcast: Tue 18 Nov 2014 - 8:30pm EST [Retro TV]
Running Time: 25 minutes 7 seconds

11.90 Million (UK)


Chart Position: 17 () (UK)

Recorded on Tue 12 Dec 1972 in TC8
Archive State: PAL 2 VT



Omega intends to escape his antimatter world and needs the Doctors to take his place. But they discover the terrible truth about Omega and realise that he can never escape.


Production Team hide uncredited
WriterBob Baker
WriterDave Martin
DirectorLennie Mayne
ProducerBarry Letts
DesignerRoger Liminton
Script EditorTerrance Dicks
Studio LightingClive Thomas
Studio SoundDerek Miller-Timmins
Costume DesignerJames Acheson
Make-upAnn Rayment
Visual Effects DesignerMichaeljohn Harris
Film CameramanJohn Baker
Film SoundBob Roberts
Film EditorJim Walker
Incidental MusicDudley Simpson
Special SoundDick Mills
Title MusicRon Grainer
and BBC Radiophonic Workshop
Visual Effects DesignerLen Hutton (uncredited)
Production AssistantDavid Tilley (uncredited)
Assistant Floor ManagerTrina Cornwell (uncredited)
Film Operations ManagerHugh Wilson (uncredited)
Visual Effects AssistantDave Havard (uncredited)
Artist BookingSybil Cave (uncredited)
Technical EffectsDerek Lightbody (uncredited)
Technical EffectsTom Moncrief (uncredited)
Lighting ChargehandDick Weller (uncredited)
Lighting ChargehandArthur Hill (uncredited)
Studio EngineerJoe Starie (uncredited)
Studio EngineerBob Hignett (uncredited)
Vision Co-ordinatorLaurie de Whalley (uncredited)
Vision Co-ordinatorDon McGregor (uncredited)
Show Working SupervisorJohnny Norris (uncredited)
Props BuyerMagda Olender (uncredited)
Production SecretarySarah Newman (uncredited)
Grams OperatorGerry Borrows (uncredited)
Floor AssistantPaul Braithwaite (uncredited)
GripTex Childs (uncredited)
Vision MixerShirley Coward (uncredited)
Director's AssistantRita Dunn (uncredited)
Technical Manager(TM2)John Fane (uncredited)
Film Camera AssistantBrian Hall (uncredited)
Sound AssistantJohn Hills-Harrop (uncredited)
Title Music ArrangerDelia Derbyshire (uncredited)
Title SequenceBernard Lodge (uncredited)