Last updated 24 March 2024


Episode Four

Series Episode Number: 235

World Premiere: Sat 15 Feb 1969 - 5:15pm BST [BBC One] (United Kingdom)
First Broadcast: Sun 16 Nov 1986 - 11:00pm CST [WTTW 11 Chicago]
Running Time: 24 minutes 57 seconds

7.10 Million (UK)

Appreciation Index: 55 (UK)

Chart Position: 74 () (UK)

Recorded on Fri 24 Jan 1969 in Lime Grove D
Archive State: 16mm t/r



As the Martian fungus begins to spread, Zoe, Jamie and Gia Kelly attempt to strike back against Slaar and his occupying force of Ice Warriors.


Production Team hide uncredited
WriterBrian Hayles
WriterTerrance Dicks (uncredited)Info
DirectorMichael Ferguson
ProducerPeter Bryant
DesignerPaul Allen
Script EditorTerrance Dicks
Film CameramanPeter Hall (uncredited)
Film SoundRon Blight (uncredited)
Film EditorMartyn Day (uncredited)
LightingHoward King (uncredited)
SoundBryan Forgham (uncredited)
CostumesBobi Bartlett (uncredited)
Make-upSylvia James (uncredited)
Incidental MusicDudley Simpson
Visual Effects DesignerBill King (uncredited)
Visual Effects Designer Trading Post (uncredited)
Special SoundBrian Hodgson (uncredited)
Title MusicRon Grainer
and the BBC Radiophonic Workshop
Vision MixerChris Griffin (uncredited)
Grams OperatorJohn Lloyd (uncredited)
Assistant Floor ManagerTrina Cornwell (uncredited)
Floor AssistantJohn Norton (uncredited)
Production AssistantFiona Cumming (uncredited)
Film Operations ManagerHugh Wilson (uncredited)
Film Camera AssistantMike Spooner (uncredited)
Film Sound AssistantI H Morton (uncredited)
Film Sound AssistantRon Keightley (uncredited)
Design AssistantPeter Blacken (uncredited)
Director's AssistantRaquel E. Ebbutt (uncredited)
Artist BookingBarbara Buchanan (uncredited)
Title SequenceBernard Lodge (uncredited)
Title Music ArrangerDelia Derbyshire (uncredited)