Richard Conte

Bill Locklin

Rona Anderson

Julia Jackson

Russell Napier

Supt. John Harrington

Sylva Langová

Hilde Heller, chief spy

Colin Gordon

Harry Martin - reporter

Donald Bisset

Editor Harris

John King-Kelly

Spy Henchman

Bernard Rebel

Vinson - Spy Henchman

Arnold Marlé

Prof. Leon Dushenko

John Horsley

Det. Sgt. Gibson

Gianfranco Parolini

Jane Welsh

Supt. McCollum - sanitarium

Aimée Delamain

Mrs. Henley

Ken Hughes

Director

John Smith

Second Assistant Director

Fred Ruff

First Assistant Director

Betty Parry

Continuity

James Eastwood

Guión, Guión Adaptado

Ken Hughes

Guión, Guión Adaptado

Eric Marschwitz

Guión

Eric Maschwitz

Historia

Josef Ambor

Director de Fotografía

Ron Robson

Camera Operator

Bob Penn

Still Photographer

Trevor Duncan

Compositor de la Música Original

Dick Smith

Sound Supervisor

Merton Park Studios

Compañía de Produccion

Jim O'Connolly

Production Manager

Jack Craig

Maquilladora

Alice McLaren

Wardrobe Master

Geoffrey Muller

Editor

Inman Hunter

Editor

Dick Smith

Sound Recordist

Sidney Rider

Sound Recordist