Director
Pennant Roberts
DIRECTOR
Writer
Douglas Adams
WRITER
Stars (in credits order)
Tom Baker
Doctor Who
Lalla Ward
Romana
Christopher Neame
Skagra
Denis Carey
Professor Chronotis
Daniel Hill
Chris Parsons
Victoria Burgoyne
Clare Keightley
David Brierly
K9(voice)
Gerald Campion
Porter (Wilkins)
Shirley Dixon
Voice of Skagra's Ship
Derek Pollitt
Professor Caldera (episode 4)
John Hallet
Police Constable (episode 6)
Graham Cole
Krarg(uncredited)
Harry Fielder
Krarg Commander(uncredited)
James Muir
Lionel Sansby
Ken Sedd
Young Scientist(uncredited)
Derek Suthern
Reg Woods
