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.


Characters hide uncredited
Dr. WhoJon Pertwee
Jo GrantKaty Manning
The MasterRoger Delgado
President of EarthVera Fusek
General WilliamsMichael Hawkins
Professor DaleHarold Goldblatt
PatelMadhav Sharma
Prison GovernorDennis Bowen
CrossRichard Shaw
SheilaLuan Peters
TechnicianCaroline Hunt
SecretaryKarol Hagar
Lunar GuardLawrence Harrington
Lunar GuardLeslie Bates (uncredited)
Earth GuardRichard King (uncredited)
Lunar GuardSteve Tierney (uncredited)
Earth GuardIan Yardley (uncredited)
Earth GuardRichard King (uncredited)
Earth GuardGeoffrey Witherick (uncredited)
PrisonerMichael Mulcaster (uncredited)
PrisonerNancy Gabrielle (uncredited)
PrisonerNelly Griffiths (uncredited)
PrisonerJohn Hughman (uncredited)
PrisonerDavid Layton (uncredited)
PrisonerFred Looker (uncredited)
PrisonerGeorge McFarlane (uncredited)
PrisonerDana Michie (uncredited)
Prisoner Monika (uncredited)
PrisonerJohn Moore (uncredited)
PrisonerJean St. Louis (uncredited)
Presidential GuardWolf Von Jurgen (uncredited)
Presidential GuardClinton Morris (uncredited)
Prison GuardDavid Billa (uncredited)
Prison GuardDennis Plenty (uncredited)
Prison GuardTerence Denville (uncredited)
Prison GuardEmmett Hennessy (uncredited)
Prison GuardGeorge Ribitt (uncredited)
Prison GuardDerek Hunt (uncredited)
Prison GuardBryan Nolan (uncredited)
DraconianSteve Tierney (uncredited)
DraconianRay Millar (uncredited)
DraconianTerry Sartain (uncredited)
DraconianKevin Moran (uncredited)
DraconianKen Wade (uncredited)
OgronGeoffrey Todd (uncredited)
OgronSteve Kelly (uncredited)
OgronMaurice Bush (uncredited)
OgronBruce Wells (uncredited)
OgronChris Stevens (uncredited)