| Actor [In Edited American Version] | Harry Reems |
| Actor | Farley Granger (as Inspector Capuana), Silvano Tranquilli (as Paolo Santangeli), Chris Avram (as Professor Casali ), Sandro Pizzochero (as Roberto), Fabrizio Moresco (as Piero), Andrea Scotti (as Gianni ), Luciano Rossi (as Gastone), Ivano Staccioli (as The Liar), Paul Oxon (as Mauro), Philippe Hersent (as The Questor), Bruno Boschetti (as Policeman), Benito Stefanelli (as Lilly's Husband), Nino Foti, Luigi Ciavarro |
| Actress | Sylva Koscina (as Barbara Capuana), Annabella Incontrera (as Franca Santangeli), Krista Nell (as Renata), Angela Covello (as Bettina Santangeli), Irene Pollmer (as Giannina), Jessica Dublin (as Rossella), Nieves Navarro (as Lilly), Femi Benussi (as Serena) |
| Actress [In Edited American Version] | Tina Russell |
| Art Direction by | Massimo Bolongaro |
| Cinematography By | Fausto Rossi |
| Directed By | Roberto Bianchi Montero |
| Executive Producer | Angelo Faccenna, Mario Pellegrino |
| Film Editing By | Rolando Salvatori |
| Music By | Giorgio Gaslini |
| Producer | Eugenio Florimonte |
| Production Manager | Francesco Vitulano |
| Screenplay | Luigi Angelo, Roberto Bianchi Montero , Italo Fasan |
| Sound | Roberto Alberghini |
| Story | Luigi Angelo, Italo Fasan |
| Voice | Kim Pope, Marc Stevens, Carolyn De Fonseca (as Rossella) |
