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Runtime
Director
Where to Watch
Tom Baker
as The Doctor
Louise Jameson
as Leela
John Leeson
as K-9 Mk. I (voice) / Nucleus (voice)
Michael Sheard
as Lowe
Brian Grellis
as Safran
Jay Neill
as Silvey
Edmund Pegge
as Meeker
Frederick Jaeger
as Professor Marius
Derrick Goodwin
Graham Williams
Producer
Dudley Simpson
Original Music Composer
Delia Derbyshire
Theme Song Performance
Dave Martin
Writer
Bob Baker
Robert Holmes
Script Editor
