| Actor | Ian Charleson (as Marco), Urbano Barberini (as commissario Alan Santini), William McNamara (as Stefano), Michele Soavi (as commissario Daniele Soave) |
| Actress | Cristina Marsillach (as Betty), Daria Nicolodi (as Mira), Coralina Cataldi-Tassoni (as Giulia), Antonella Vitale (as Marion), Barbara Cupisti (as Signora Albertini) |
| Cinematographer | Ronnie Taylor |
| Co-Producer | Mario Cecchi Gori, Vittorio Cecchi Gori |
| Composer | Brian Eno, Claudio Simonetti |
| Director, Screenwriter, Screen Story Writer, Producer | Dario Argento |
| Film Editor | Franco Fraticelli |
| Writer (Screenplay) | Franco Ferrini |
| Links | https://www.imdb.com/title/tt0093677/ · https://en.wikipedia.org/wiki/Opera_(film) · Trailer |
