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

Arthur Lane

Bob Hendon

Hugo Schuster

Professor Henrik

John Boxer

Inspector Dalton

Michael Ripper

Bill Rymer

Michael Balfour

Stevens

Alexander Field

Train Porter

Vivienne Martin

Lola

John Warren

Bargee

Fred Griffiths

Gymnasium Attendant

Terence Brook

Man on Sofa

Patrick Dowling

First Reporter

Arthur Bentlet

Second Reporter