Peter van Eyck

Georg Droste

Marianne Koch

Nora Gulden

Macdonald Carey

Mr. Smith

Christopher Lee

Baron Ferdi von Staub

Billie Whitelaw

Piroska Maslov

Albert Lieven

Inspector Huebling

David Knight

Father Zombary

Marius Goring

General Greenhahn

Helen Cherry

Countess Carla Cosimano

Colin Gordon

Count Dezsepalvy

Niall MacGinnis

Paul Vass

Eric Pohlmann

Bloch

Peter Vaughan

Chief of Hungarian Police

Michael Brennan

Horvat

Jeremy Bulloch

Johnny Droste

Bart Bastable

Cattle Truck Driver (uncredited)

Charles Byrne

Vazlan (uncredited)

Christopher Casson

Headmaster (uncredited)

John Cowley

Funnel-Shaped Man

Adrian Cronon

Young Priest (uncredited)

Vincent Dowling

Father Farcosc (uncredited)

Walter Gotell

Dr. Ritter (uncredited)

Peadar Lamb

Muller (uncredited)

Robert Lepler

Head Waiter (uncredited)

Jeffrey O'Kelly

Spy (uncredited)

Norman Rodway

Machine Gunner at Border (uncredited)