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

Paul Bonifas

Charlie

Jean Claudio

Sergeant Thomas

Pierre Collet

German Warder

Anthony Dawson

Major Stillman

Robert Favart

General Dalrymple

Bernard Fresson

French Resistant Raymond

Gisèle Grimm

Major Lawrence

Clément Harari

Losch

Jacques Harden

Canadian Prisoner

David Hutcheson

Ministry Official

Richard Larke

Jersey Prison Warder

Guy Marly

Luftwaffe Officer

Paul Mesnier

Wehrmacht General

Charles Millot

2nd Polish Interrogator

Jean Ozenne

Gal Von Langsdorf

Edward Underdown

Air Marshall

Van Doude

Plotting Officer

Howard Vernon

German Embassy Official

Francis de Wolff

German Colonel General

Jean-Pierre Zola

Jersey Prison Commandant

Jean-Marc Bory

Resistance Leader (uncredited)

Gordon Jackson

British Sergeant Questioning Chapman (uncredited)

Laure Paillette

Old Lady (uncredited)

Frank Phillips

Radio Announcer (voice) (uncredited)

Robert Rietti

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