Cast

Boris Karloff

Colonel March

Ewan Roberts

Inspector Ames

Joan Sims

Marjorie Dawson

Richard Wattis

Cabot

Sheila Burrell

Joan Forsythe

Anthony Forwood

Jim Hartley

Ronald Leigh-Hunt

Ireton Bowlder

Patricia Owens

Betty Hartley

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John Hewer

John Parrish

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Roger Maxwell

Maj. Rodman

Crew

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Donald Ginsberg

Producer (Production)

Cy Endfield

Director (Directing)

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Eric Cass

Boom Operator (Sound)

Desmond Davis

Focus Puller (Camera)