Gregory Peck as Monsignor Hugh O'Flaherty

Christopher Plummer as Col. Herbert Kappler

John Gielgud as Pope Pius XII

Raf Vallone as Father Vittorio

Kenneth Colley as Capt. Hirsch

Walter Gotell as Gen. Max Helm

Barbara Bouchet as Minna Kappler

Olga Karlatos as Francesca Lombardo

Julian Holloway as Alfred West

Angelo Infanti as Father Morosini

Michael Byrne as Reinhard Beck

T. P. McKenna as Himmler

Vernon Dobtcheff as Count Langenthal

John Terry as Lt. Jack Manning

Peter Burton as Sir D'Arcy Osborne

Fabiana Udenio as Guila Lombardo

Billy Boyle as Paddy

Phillip Hatton as Lt. Harry Barnett

Marne Maitland as Papal Secretary

Remo Remotti as Rabbi Leoni

Mark Lewis as

Giovanni Crippa as

Itaco Nardulli as

Cariddi Nardulli as

William Berger as

Edmund Purdom as

Gabriella D'Olive as