Last updated 24 March 2024


Episode Two

Series Episode Number: 319

World Premiere: Sat 15 Apr 1972 - 5:51pm BST [BBC One] (United Kingdom)
First Broadcast: Tue 30 Sep 1975 - 6:30pm CDT [WTTW 11 Chicago]
Running Time: 24 minutes 24 seconds

7.80 Million (UK)


Chart Position: 38 () (UK)

Recorded on Tue 29 Feb 1972 in TC4
Archive State: RSC conver



Fearing Jo has died in Solos's hostile environment, the Doctor is forced to work with the scientist, Jaeger, to make the planet's atmosphere breathable for humans.


Production Team hide uncredited
WriterBob Baker
WriterDave Martin
DirectorChristopher Barry
ProducerBarry Letts
DesignerJeremy Bear
Script EditorTerrance Dicks
Studio LightingFrank Cresswell
Studio SoundTony Millier
CostumesJames Acheson
Make-upJoan Barrett
Visual Effects DesignerJohn Horton
Film CameramanFred Hamilton
Film SoundDick Manton
Film EditorDave King
Special SoundBrian Hodgson
Incidental MusicTristram Cary
Title MusicRon Grainer
Title Music BBC Radiophonic Workshop
Fight ArrangerTerry Walsh (uncredited)
Production AssistantFiona Cumming (uncredited)
Assistant Floor ManagerSue Hedden (uncredited)
Title Music ArrangerDelia Derbyshire (uncredited)
Title SequenceBernard Lodge (uncredited)
AssistantJoan Elliott (uncredited)
Floor AssistantPhillip Hall (uncredited)
Grams OperatorGordon Phillipson (uncredited)
Vision MixerMichael Turner (uncredited)
Technical Manager(TM2)Clive Leighton (uncredited)