Tom Baker
The Doctor
Acting
Lalla Ward
Romana II
Acting
David Brierly
K9 (voice)
Acting
Graham Crowden
Soldeed
Acting
Michael Osborne
Sorak
Acting
Bob Hornery
Pilot
Acting
Malcolm Terris
Co-Pilot
Acting
Clifford Norgate
Nimon (voice)
Acting
Robin Sherringham
Nimon
Acting
Bob Appleby
Nimon
Acting
Trevor St. John Hacker
Nimon
Acting
Janet Ellis
Teka
Acting
Simon Gipps-Kent
Seth
Acting
John Bailey
Sezom
Acting