The Doctor
Tom Baker
Romana II
Lalla Ward
Nimon
Trevor St. John Hacker
Teka
Janet Ellis
Seth
Simon Gipps-Kent
Sezom
John Bailey
K9 (voice)
David Brierly
Soldeed
Graham Crowden
Sorak
Michael Osborne
Pilot
Bob Hornery
Co-Pilot
Malcolm Terris
Nimon (voice)
Clifford Norgate
Robin Sherringham
Bob Appleby
Original Music Composer
Dudley Simpson
Script Editor
Douglas Adams
Costume Design
June Hudson
Production Design
Graeme Story
Visual Effects
Dave Jervis
Makeup Artist
Christine Walmesley-Cotham
Production Assistant
Henry Foster
Camera Operator
Alec Wheal
Special Sound Effects
Dick Mills
Lighting Director
Nigel Wright
Sound
John Hartshorn
Editor
Rod Waldron
Visual Effects Designer
Peter Pegrum
Director
Kenny McBain
Writer
Anthony Read
Producer
Graham Williams