Mark Terzi goes to Genoa to take on the case of a serial killer who calls himself "The Sphinx".
| Directing | Stelvio Massi | Director |
| Writing | Dardano Sacchetti | Story |
| Writing | Dardano Sacchetti | Screenplay |
| Writing | Teodoro Corrà | Screenplay |
| Writing | Raniero Di Giovanbattista | Screenplay |
| Writing | Stelvio Massi | Screenplay |
| Production | Teodoro Corrà | Delegated Producer |
| Production | Raniero Di Giovanbattista | Line Producer |
| Art | Carlo Leva | Production Design |
| Costume & Make-Up | Carlo Leva | Costume Design |
| Sound | Adriano Fabi | Original Music Composer |
| Editing | Mauro Bonanni | Editor |
| Camera | Federico Zanni | Director of Photography |
| Production | Pietro Bregni | Producer |
| Directing | Cesare Landricina | First Assistant Director |
| Directing | Luigina Lovari | Script Supervisor |
| Camera | Michele Pensato | Camera Operator |
| Camera | Edmondo Pisani | Camera Operator |
| Camera | Mario Pastorini | Assistant Camera |
| Costume & Make-Up | Dante Trani | Makeup Artist |
| Costume & Make-Up | Romana Piolanti | Hairstylist |
| Art | Giovanni Fratalocchi | Set Decoration |
| Editing | Walter Diotallevi | Assistant Editor |
| Editing | Bruna Abbatelli | Assistant Editor |
| Sound | Roberto Alberghini | Sound |
| Sound | Antonio Pantano | Boom Operator |
| Camera | Giuseppe Raimondi | Key Grip |
| Lighting | Salvatore Gentile | Gaffer |
| Production | Lamberto Palmieri | Unit Manager |
| Production | Agostino Pasti | Production Secretary |
| Production | Giuseppe Cicconi | Production Secretary |
| Production | Gaetano Fuzio | Administration |
| Crew | Sergio Mioni | Stunt Coordinator |
| Production | Mario Bregni | Producer |