 | Terence Stamp als Padre Andreani, poi Papa Giovanni Clemente I |
 | Fabrizio Bentivoglio als Padre Bruno Martello |
 | Paula Molina als Nina |
 | Gabriele Ferzetti als Cardinale Ixaguirre |
 | José Luis López Vázquez als Don Perrone |
 | Antonio Marsina als Vittorio |
 | Adriano Amidei Migliano als Dottore |
 | Eduardo Fajardo als Rettore |
 | Frank Nuyen als Cardinal (uncredited) |
| Marcello Aliprandi | Director |
| Davide Bassan | Set Decoration |
| Pino Donaggio | Original Music Composer |
| Antonio Siciliano | Editor |
| Marcello Aliprandi | Screenplay |
| Lucio Battistrada | Screenplay |
| Alberto Fioretti | Screenplay |
| Pedro Mario Herrero | Screenplay |
| Enzo Gallo | Screenplay |
| Maurice Serral | Screenstory |
| Max Savigny | Screenstory |
| Alejandro Ulloa | Director of Photography |
| Elio Micheli | Art Direction |
| Antonio de Miguel | Art Designer |
| Enzo Gallo | Producer |
