Tom Baker
The Doctor
Cast (8)
Louise Jameson
Leela
John Leeson
K-9 Mk. I (voice) / Nucleus (voice)
Michael Sheard
Lowe
Brian Grellis
Safran
Jay Neill
Silvey
Edmund Pegge
Meeker
Frederick Jaeger
Professor Marius
Crew (6)
Dave Martin
Writer
Derrick Goodwin
Director
Bob Baker
Writer
Robert Holmes
Script Editor
Dudley Simpson
Original Music Composer
Graham Williams
Producer