Secret Venture

Kent Taylor

Ted O'Hara

Jane Hylton

Joan Butler

Kathleen Byron

Renee L'Epine

Karl Stepanek

Zelinsky

Frederick Valk

Otto Weber

Maurice Kaufmann

Dan Flemying

Martin Boddey

Squire Marlowe, the Wrestler

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Arthur Lane

Bob Hendon

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Hugo Schuster

Professor Henrik

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John Boxer

Inspector Dalton

Michael Ripper

Bill Rymer

Michael Balfour

Stevens

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Alexander Field

Train Porter

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Vivienne Martin

Lola

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John Warren

Bargee

Fred Griffiths

Gymnasium Attendant

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Terence Brook

Man on Sofa

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Patrick Dowling

First Reporter

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Arthur Bentlet

Second Reporter