Last updated 24 March 2024


Episode Three

Series Episode Number: 295

World Premiere: Sat 24 Apr 1971 - 6:13pm BST [BBC One] (United Kingdom)
First Broadcast: Wed 3 Dec 1975 - 6:30pm CST [WTTW 11 Chicago]
Running Time: 24 minutes 47 seconds

9.50 Million (UK)


Chart Position: 26 () (UK)

Recorded on Fri 19 Mar 1971 in Television Centre 3
Archive State: RSC conver



When Jo attempts to break into the IMC ship to find incriminating information, she is captured and held hostage. If the Doctor doesn't cooperate, Captain Dent will have Jo killed.


Characters hide uncredited
Doctor WhoJon Pertwee
Jo GrantKaty Manning
CaldwellBernard Kay
WintonNicholas Pennell
AsheJohn Ringham
DentMorris Perry
MorganTony Caunter
NortonRoy Skelton
Mary AsheHelen Worth
AllenStanley McGeagh
LongPat Gorman
RobotJohn Scott Martin
PrimitiveLes Clark (uncredited)
PrimitiveJohn McGrath (uncredited)
PrimitiveDerek Chafer (uncredited)
PrimitiveStewart Anderson (uncredited)
ColonistCharles Pickess (uncredited)
ColonistKen Halliwell (uncredited)
ColonistAlan Peters (uncredited)
ColonistJohn Caesar (uncredited)
ColonistBob Blaine (uncredited)
ColonistIan Elliott (uncredited)
IMC GuardBrian Gilmar (uncredited)
IMC GuardBrian Justice (uncredited)
IMC GuardKeith Simon (uncredited)
IMC GuardStewart Stephens (uncredited)
Stunt ManTerry Walsh (uncredited)
Stunt ManDinny Powell (uncredited)
Stunt ManAlf Joint (uncredited)
Stunt ManMike Horsburgh (uncredited)
PrimitiveValentino Musetti (uncredited)Info
VoicesMichael E Briant (uncredited)Info