Richard Conte
Bill Locklin
Rona Anderson
Julia Jackson
Russell Napier
Supt. John Harrington
Sylva Langova
Hilde Heller - chief spy
Colin Gordon
Harry Martin - reporter
Donald Bisset
Editor Harris
John King-Kelly
Spy Henchman
Bernard Rebel
Vinson - Spy Henchman
Arnold Marle
Prof. Leon Dushenko
John Horsley
Det. Sgt. Gibson
Jane Welsh
Supt. McCollum - sanitarium
Theodore Wilhelm
Secretary of the International Social Club
Colin Tapley
Sir Clive Raglan
Noel Johnson
Det. Sgt. Hawkins
Jessica Kearns
Airport Hostess
Geoffrey Denys
Police Dr. Mayhew
Gianfranco Parolini
Police Inspector May - sanitorium
Guy Deghy
Social Club Recreation Director
Peter Godsell
Tommy McCollum
Aimee Delamain
Mrs. Henley (Dr Barnes's Housekeeper)
Ed Devereaux
American Sailor
Jon Farrell
American Newscaster
Alastair Hunter
First reporter
Gareth Jones
Russian Sentry
Cyril Kent
Santatorium Attendant
George Margo
American Sailor
Andre Mikhelson
East German Chief of Border Guards
Robert O'Neil
Second reporter
Joe Wadham
Man Helping Dushenko Escape
Roger Williams
Dr. Clement Barnes
US release: 19th June 1955
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