Christopher Plummer

Freddie Chapman

Romy Schneider

Helga Lindstrom (The Countess)

Trevor Howard

Freddie Young (Distinguished Civilian)

Gert Fröbe

Colonel Steinhager

Claudine Auger

Paulette

Yul Brynner

Baron von Grunen

Harry Meyen

Lieutenant Keller

Georges Lycan

Leo

Jess Hahn

Commander Braid

John Abbey

Lang

Paul Bonifas

Charlie

Jean-Roger Caussimon

Luftwaffe General (as Jean Rene Caussimon)

Jean Claudio

Sergeant Thomas

Pierre Collet

German Warder

Anthony Dawson

Major Stillman

Georges Douking

Polish Interrogator

Colin Drake

English Farmer

Robert Favart

General Dalrymple

Bernard Fresson

French Resistant Raymond

Gisèle Grimm

Major Lawrence

Harvey Hall

Detainee Center Sergeant

Clément Harari

Losch

Jacques Harden

Canadian Prisoner

David Hutcheson

Ministry Official

Marcel Journet

Marshall von Runstedt

Robert Le Béal

Lieutenant Cameron

Violette Marceau

Prisoner Girl

Guy Marly

Luftwaffe Officer

Charles Millot

2nd Polish Interrogator

Hubert Noël

Von Runstedt's Aide de Camp

Jean Ozenne

Gal Von Langsdorf

Albert Simono

B.B.C. Reporter

Michel Thomass

3rd Polish Interrogator

Edward Underdown

Air Marshall

François Valorbe

S.S. Commandant

Van Doude

Plotting Officer

Howard Vernon

German Embassy Official

Francis de Wolff

German Colonel General

Jean-Marc Bory

Resistance Leader (uncredited)

Gordon Jackson

British Sergeant Questioning Chapman (uncredited)

Laure Paillette

Old Lady (uncredited)

Robert Rietti

B.B.C. Reporter (voice) (uncredited)

Sylvia Sorrente

Hostess in the Club (uncredited)