James Mason ( James Mason )

Ulysses Diello

Danielle Darrieux ( Danielle Darrieux )

Condesa Anna Staviska

Michael Rennie ( Michael Rennie )

Colin Travers

Walter Hampden ( Walter Hampden )

Sir Frederic Taylor

Oskar Karlweis ( Oskar Karlweis )

L. C. Moyzisch

Herbert Berghof ( Herbert Berghof )

Col. von Richter

John Wengraf ( John Wengraf )

Count Franz Von Papen

Ben Astar ( Ben Astar )

Siebert

Roger Plowden ( Roger Plowden )

Keith Macfadden

Diane Adrian ( Diane Adrian )

Singer on French Record (voice)

Patrick Whyte ( Patrick Whyte )

Code Clerk

Hanna Axmann-Rezzori ( Hanna Axmann-Rezzori )

David Bauer ( David Bauer )

Lawrence Dobkin ( Lawrence Dobkin )

Martín Garralaga ( Martín Garralaga )

Lumsden Hare ( Lumsden Hare )

Richard Loo ( Richard Loo )

Lester Matthews ( Lester Matthews )

Keith McConnell ( Keith McConnell )

Frank McLure ( Frank McLure )

Charles Meakin ( Charles Meakin )

Alberto Morin ( Alberto Morin )

Nestor Paiva ( Nestor Paiva )

Michael Pate ( Michael Pate )

Konstantin Shayne ( Konstantin Shayne )

Ivan Triesault ( Ivan Triesault )

Otto Waldis ( Otto Waldis )

Alfred Zeisler ( Alfred Zeisler )

Stuart Hall ( Stuart Hall )

British Military Attaché (uncredited)