| Actor | Luigi Pistilli (as Detective John Norton), Anton Diffring (as Sobiesky Ambassador ( Ambasciatore Sobiesky )), Arthur O'Sullivan (as Lawrence Police Inspector ( Ispettore )), Werner Pochath (as Marc Sobiesky), Renato Romano (as Mandel), Sergio Doria (as Walter), Niall Toibin (as Doctor ( Uncredited )) |
| Actress | Valentina Cortese (as Mrs. Sobiesky), Dagmar Lassander (as Helen Sobiesky), Dominique Boschero (as Ambassador's Lover ( Amante Ambasciatore )), Ruth Darley (as Norton's Mother ( Madre Di Norton )), Emmet Bergin (as Man In Café ( Uncredited )) |
| Art Director | Giuseppe Chevalier |
| Assistant | Leo Jahn (as Assistant Director) |
| Co-Producer | Robert Dorfmann (as Uncredited) |
| Creator | Nadia Vitali (as Costume Design), Lamberto Marini (as Make-up) |
| Director | Riccardo Freda |
| Director Of Photography | Silvano Ippoliti |
| Film Editor | Riccardo Freda |
| Music | Stelvio Cipriani |
| Producer | Ennio Nobili (as Uncredited) |
| Production Company | Les Films Corona, Oceania Produzioni Internazionali Cinematografiche, Terra-Filmkunst |
| Production Designer | Giuseppe Chevalier |
| Screenplay | Riccardo Freda, Sandro Continenza, Gunther Ebert (as Collaborator), Renato Romano (as Uncredited) |
| Sound | Aldo De Martino |
| Links | https://www.davinotti.com |
