Cast

Tom Baker

The Doctor

Louise Jameson

Leela

John Leeson

K-9 Mk. I (voice) / Nucleus (voice)

Michael Sheard

Lowe

Brian Grellis

Safran

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Jay Neill

Silvey

Edmund Pegge

Meeker

Frederick Jaeger

Professor Marius

Crew

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Dave Martin

Writer (Writing)

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Derrick Goodwin

Director (Directing)

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Bob Baker

Writer (Writing)

Dudley Simpson

Original Music Composer (Sound)

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Graham Williams

Producer (Production)

Robert Holmes

Script Editor (Writing)