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