출연진
Tom Baker
The Doctor
Lalla Ward
Romana (voice)
David Brierly
K9 (archive footage) (voice)
Christopher Neame
Skagra (voice)
Daniel Hill
Chris Parsons (voice)
Denis Carey
Professor Chronotis (archive footage)
Victoria Burgoyne
Clare Keightley (voice)
Gerald Campion
Wilkin (archive footage)
Shirley Dixon
The Ship (voice)
Derek Pollitt
Dr. Caldera (archive footage)
James Coombes
The Krargs (voice)
John Hallet
Police Constable
David Strong
Man in Car (archive footage)
James Muir
Fisherman (archive footage)
Derek Suthern
Krarg
Barnaby Edwards
Krarg
Tim Bentinck
The Doctor (body double)
Toby Hadoke
Continuity Announcer (voice)