Last updated 24 March 2024


Episode Three

Series Episode Number: 340

World Premiere: Sat 10 Mar 1973 - 5:52pm GMT [BBC One] (United Kingdom)
Running Time: 24 minutes

7.50 Million (UK)


Chart Position: 57 () (UK)

Recorded on Mon 16 Oct 1972 in TC3
Archive State: PAL 2 VT



Accused of being a spy, the Doctor is sentenced to imprisonment on the Moon while Jo is taken into the custody of an old enemy.


Production Team hide uncredited
WriterMalcolm Hulke
DirectorPaul Bernard
ProducerBarry Letts
DesignerCynthia Kljuco
Script EditorTerrance Dicks
Incidental MusicDudley Simpson
Special SoundDick Mills
Title MusicRon Grainer
Title Music BBC Radiophonic Workshop
Technical ManagerTommy Dawson (uncredited)
Costume DesignerBarbara Kidd (uncredited)
Vision MixerMichael Turner (uncredited)
Floor AssistantChris Moss (uncredited)
Grams OperatorGordon Phillipson (uncredited)
Post Production SoundRay Angel (uncredited)
Make-upSandra Shepherd (uncredited)
Studio LightingRalph Walton (uncredited)
Studio SoundBrian Hiles (uncredited)
Visual Effects DesignerRhys Jones (uncredited)
Visual Effects DesignerBernard Wilkie (uncredited)
Masks byJohn Friedlander (uncredited)
Assistant Floor ManagerJohn Bradburn (uncredited)
Film CameramanJohn Tiley (uncredited)
Film EditorJohn Bush (uncredited)
Production AssistantNicholas John (uncredited)
Title Music ArrangerDelia Derbyshire (uncredited)
Title SequenceBernard Lodge (uncredited)
Production SecretarySarah Newman (uncredited)
Music CopyistGeorge Bayton (uncredited)
Artist BookingSybil Cave (uncredited)
Property BuyerRuth Hyde (uncredited)
AssistantKay Stephens (uncredited)