| 角色 | 饰演者 | 角色介绍 |
| Carlo Giordani | 詹姆斯·弗朗西斯 | |
| Franco Arno | 卡尔·莫尔登 | |
| Anna Terzi | 凯瑟琳·斯帕克 | |
| Police Supt. Spini | Pier Paolo Capponi | |
| Dr. Braun | Horst Frank | |
| Bianca Merusi | Rada Rassimov | |
| Dr. Casoni | Aldo Reggiani | |
| Dr. Calabresi | Carlo Alighiero | |
| Righetto (cameraman) | Vittorio Congia | |
| Gigi the Loser | Ugo Fangareggi | |
| Dr. Esson | Tom Felleghy | |
| Dr. Mombelli | Emilio Marchesini | |
| Spimi's man | Fulvio Mingozzi | |
| Morsella | Corrado Olmi | |
| Barber | Pino Patti | |
| Manuel's ex-lover | Umberto Raho | |
| Prof. Manera | Jacques Stany | |
| Taxi driver | Stefano Oppedisano | |
| Telephone operator | Ada Pometti | |
| (as Sacha Helwin) | Sacha Helwin | |
| Film starlet | Maria Luise Zetha | |
| Lori | Cinzia De Carolis | |
| Manuel | Werner Pochath | |
| Prof. Fulvio Terzi | Tino Carraro | |
| Chief of Police Salmi (uncredited) | Giovanni Di Benedetto | |
| Lori's babysitter (uncredited) | Margherita Horowitz |
