출연진
Tom Baker
The Doctor
Lalla Ward
Romana
David Brierly
K-9 (voice)
Christopher Neame
Skagra
Daniel Hill
Chris Parsons
Denis Carey
Professor Chronotis
Victoria Burgoyne
Clare Keightley
Gerald Campion
Wilkin
Shirley Dixon
The Ship (voice)
Derek Pollitt
Dr. Caldera
James Coombes
The Krargs (voice)
John Hallet
Police Constable
David Strong
Passenger
James Muir
Fisherman
Derek Suthern
Krarg
Barnaby Edwards
Krarg
Tim Bentinck
The Doctor (body double)
Toby Hadoke
Continuity Announcer (voice)