 | Gian Maria Volonté als Giordano Bruno |
 | Hans Christian Blech als Sartori |
 | Mathieu Carrière als Orsini |
 | Renato Scarpa als Fra Tagagliolo |
 | Giuseppe Maffioli als Arsenalotto |
 | Charlotte Rampling als Fosca |
 | Mark Burns als Bellarmino |
 | Alberto Plebani als L'alto prelato |
 | Franco Balducci als Il secondino |
 | Paolo Bonacelli |
 | Corrado Gaipa |
 | Gabriele Bentivoglio |
| Lucio De Caro | Screenplay |
| Giuliano Montaldo | Director |
| Giuliano Montaldo | Screenplay |
| Ennio Morricone | Original Music Composer |
| Sergio Canevari | Set Decoration |
| Sergio Canevari | Production Design |
| Carlo Ponti | Producer |
| Lorenzo Magnolia | Assistant Director |
| Vittorio Storaro | Director of Photography |
| Antonio Siciliano | Editor |
| Vera Pescarolo | Assistant Director |
| Leo Pescarolo | Executive Producer |
| Enrico Sabbatini | Costume Design |
| Antonio Gabrielli | Assistant Director |
