Cast

Bela Lugosi

Dr. Melcher/ Monsieur Colomb

Clayton Moore

FBI Agent Richard ‘Dick’ Martin

Joan Barclay

Alice Saunders

George Pembroke

Dr. William Saunders

Robert Frazer

Amos Hanlin

Robert Fiske

Phillip Wallace

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Irving Mitchell

John Van Dyke

Edward Peil Sr.

Ryder

Kenneth Harlan

FBI Chief Colton

Max Hoffman Jr.

Kearney

Crew

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Jack Dietz

Production Manager (Production)

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Carl Pierson

Editor (Editing)

Sam Katzman

Producer (Production)

William Nigh

Director (Directing)

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Arthur Reed

Director of Photography (Camera)

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Johnny Lange

Music (Sound)

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Lew Porter

Music (Sound)

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Jack Dietz

Producer (Production)

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Dave Milton

Art Direction (Art)

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Glen Glenn

Sound Engineer (Sound)