Last updated 24 March 2024


Part Four

Series Episode Number: 425

World Premiere: Sat 21 Feb 1976 - 5:46pm GMT [BBC One] (United Kingdom)
First Broadcast: Wed 30 Apr 1980 - 5:30pm CDT [WTTW 11 Chicago]
Running Time: 24 minutes 46 seconds

11.10 Million (UK)


Chart Position: 23 () (UK)

Recorded on Tue 02 Dec 1975 in TC4



Keeler has been infected by the alien pod and is transforming into a Krynoid. Chase refuses to listen to the Doctor's warning and throws him into a compost machine.


Production Team hide uncredited
WriterRobert Banks Stewart
DirectorDouglas Camfield
ProducerPhilip Hinchcliffe
DesignerRoger Murray-Leach
Script EditorRobert Holmes
OB LightingClive Potter
OB SoundVic Godrich
Studio LightingJohn Dixon
Studio SoundJohn Holmes
Visual Effects DesignerRichard Conway
Costume DesignerBarbara Lane
Make-upAnn Briggs
Incidental MusicGeoffrey Burgon
Special SoundDick Mills
Title MusicRon Grainer
and BBC Radiophonic Workshop
Title SequenceBernard Lodge
Production AssistantGraeme Harper
Production Unit ManagerJanet Radenkovic
Fight ArrangerTerry Walsh
Assistant Floor ManagerSue Shearman (uncredited)
Vision MixerGraham Giles (uncredited)
Technical ManagerBernard Fox (uncredited)
Electronic EffectsDave Jervis (uncredited)
Grams OperatorAndrew Hunter (uncredited)
Technical Manager(TM2)Bert Robinson (uncredited)
Senior CameramanPaul Kay (uncredited)
OB Vision MixerPaul Jackson (uncredited)
OB CameramanSimon Fone (uncredited)
OB CameramanFrank Hudson (uncredited)
Floor AssistantSteve Haggard (uncredited)
Make-Up AssistantCatherine Cary-Elwes (uncredited)
Make-Up AssistantJanet Gilpin (uncredited)
Make-Up AssistantGillian Thomas (uncredited)
Design AssistantJan Spoczynski (uncredited)
Director's AssistantBriony Brown (uncredited)
Artist BookingNansi Davies (uncredited)
DresserArthur Funge (uncredited)
DresserMoira Fitzgerald (uncredited)
Pre-Production SecretaryGillian Bowles (uncredited)
Facilities BookerCarol Vigurs (uncredited)
Orchestrated byAlan Merrick (uncredited)
Title Music ArrangerDelia Derbyshire (uncredited)