Last updated 24 March 2024


Episode Five

Series Episode Number: 322

World Premiere: Sat 6 May 1972 - 5:51pm BST [BBC One] (United Kingdom)
First Broadcast: Fri 3 Oct 1975 - 6:30pm CDT [WTTW 11 Chicago]
Running Time: 24 minutes 37 seconds

7.90 Million (UK)


Chart Position: 44 () (UK)

Recorded on Mon 27 Mar 1972 in TC3
Archive State: PAL 2 VT



With Jo held prisoner, the Doctor is forced to work for the Marshal. The Earth Investigator's ship prepares to dock at Skybase.


Production Team hide uncredited
WriterBob Baker
WriterDave Martin
DirectorChristopher Barry
ProducerBarry Letts
DesignerJeremy Bear
Script EditorTerrance Dicks
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
Studio LightingFrank Cresswell (uncredited)
Studio SoundTony Millier (uncredited)
CostumesJames Acheson (uncredited)
Make-upJoan Barrett (uncredited)
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)