 | Kelly Curtis als Miriam Kreisl |
 | Herbert Lom als Moebius Kelly |
 | Mariangela Giordano als Kathryn |
 | Michel Adatte als Frank |
 | Carla Cassola als Dr. Pernath |
 | Angelika Maria Boeck als Claire Henri |
 | Giovanni Lombardo Radice als Martin Romero |
| Niels Gullov als Mr. Henri |
 | Tomas Arana als Damon |
 | Michele Soavi als Magician on TV (uncredited) |
 | Donald O'Brien als Justice Jonathan Ford |
 | Stefania Possamai als Teacher (uncredited) |
| Yasmine Ussan als Samantha |
| Dario Casalini als Mark |
| Paolo Pranzo als Steven |
 | Richard Sammel als Truck Driver |
| Ralph Bola Mustapha als Second Truck Driver |
| Erika Sinisi als Sara |
| Dario Argento | Writer |
| Gianni Romoli | Writer |
| Michele Soavi | Writer |
| Michele Soavi | Director |
| Nicola Pecorini | Steadicam Operator |
| Marco Lippi | Foley |
| Iolanda Angelucci | Hairstylist |
| Rosario Prestopino | Special Effects |
| Camillo Sabatini | Camera Operator |
| Sandro De Pascalis | Steadicam Operator |
| Pino Donaggio | Music |
| Raffaele Mertes | Director of Photography |
| Franco Vitale | Still Photographer |
| Mirella Pedetti | Seamstress |
| Vittorio Cecchi Gori | Producer |
| Adriana Benedetti | First Assistant Editor |
| Dario Argento | Producer |
| Rosario Prestopino | Makeup Artist |
| Mario Cecchi Gori | Producer |
| Massimo Antonello Geleng | Production Design |
| Sergio Stivaletti | Animatronic and Prosthetic Effects |
| Massimo Anzellotti | Sound Effects Editor |
| Franco Fraticelli | Editor |
| Mario Bagnato | Underwater Camera |
| Massimo Cristofanelli | Special Effects |
| Vera Cozzolino | Costume Design |
| Giovanni Gebbia | Steadicam Operator |
