Jerry London Director Gregory Peck Monsignor Hugh O'Flaherty Actor Christopher Plummer Col. Herbert Kappler Actor John Gielgud Pope Pius XII Actor Raf Vallone Father Vittorio Actor Barbara Bouchet Minna Kappler Actor Olga Karlatos Francesca Lombardo Actor William Berger U.S. Intelligence Officer Actor Edmund Purdom British Intelligence Officer, Epilogue Narrator Actor David Butler Screenwriter Howard P. Alston Executive Producer Bill McCutchen Producer Ennio Morricone Original Music Giuseppe Rotunno Cinematographer Benjamin A. Weissman Film Editing John Stoll Production Design Pier Luigi Basile Production Design Carlo Gervasi Set Decoration Annalisa Nasalli-Rocca Costume Design