Directed by
| Lucio Fulci | ||
Writing Credits
| Roberto Gianviti | ... | (story) & |
| Lucio Fulci | ... | (story) |
| Lucio Fulci | ... | (screenplay) & |
| Roberto Gianviti | ... | (screenplay) & |
| José Luis Martínez Mollá | ... | (screenplay) (as Jose Luis Martinez Molla) |
| Lucio Fulci | ... | (a film written by) |
| Massimo Castellani | ... | (screenplay collaborator) (uncredited) |
| Franco Ferrari | ... | (screenplay collaborator) (uncredited) |
| Massimo Franciosa | ... | (screenplay collaborator) (uncredited) |
Cast (in credits order) verified as complete
| Jean Sorel | ... | Dr. George Dumurrier | |
| Marisa Mell | ... | Susan Dumurrier / Monica Weston | |
| Elsa Martinelli | ... | Jane Bleeker | |
| Alberto de Mendoza | ... | Henry Dumurrier | |
| John Ireland | ... | Inspector Wald | |
| Riccardo Cucciolla | ... | Benjamin Wormser | |
 |
Bill Vanders | ... | Insurance Agent |
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Franco Balducci | ... | Officer Loveday |
| Giuseppe Addobbati | ... | Brent (as John Douglas) | |
| Félix Dafauce | ... | Royal Insurance Official (as Felix de Fauce) | |
| Jesús Puente | ... | Sergeant Rodriguez (as Jesus Puente) | |
| Jorge Rigaud | ... | Arthur Mitchell (as George Rigaud) | |
|
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Jean Sobieski | ... | Larry (as Jean Sobiesky) |
| Faith Domergue | ... | Marta / Martha | |
| Rest of cast listed alphabetically: | |||
| Janet Agren | ... | Girl looking for Neurosedyl (uncredited) | |
| Adolfo Celi | ... | Mr. Bernard (archive footage) (uncredited) | |
|
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Geoffrey Copleston | ... | District Attorney (uncredited) |
| Lucio Fulci | ... | Graphologist (uncredited) | |
| Malisa Longo | ... | Elizabeth O'Neill (uncredited) | |
|
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Raffaele Mottola | ... | Governor (uncredited) |
| Bobby Rhodes | ... | Prison Guard (uncredited) | |
Produced by
| Edmondo Amati | ... | producer |
| Maurizio Amati | ... | executive producer (uncredited) |
| José Frade | ... | co-producer (uncredited) |
| Jacques Roitfeld | ... | co-producer (uncredited) |
Music by
| Riz Ortolani | ||
Cinematography by
| Alejandro Ulloa | ... | director of photography |
Editing by
| Ornella Micheli | ||
Production Design by
| Nedo Azzini | ||
| Román Calatayud | ... | (as Roman Calatayud) |
Set Decoration by
| Pier Luigi Basile | ||
Costume Design by
| Lucia Mirisola | ||
Makeup Department
| Giuseppe Banchelli | ... | makeup artist |
| Iole Cecchini | ... | hair stylist |
Production Management
| Renato Jaboni | ... | general organization |
| Massimo Manasse | ... | production supervisor |
| Luis Méndez | ... | production manager (as Luis Mendez) |
| Francisco J. Tudela | ... | production supervisor (as Francisco Tudela) |
Second Unit Director or Assistant Director
| Massimo Castellani | ... | assistant director (as Max Castellani) |
| Albino Cocco | ... | assistant director (as Alvin Cocco) |
Art Department
| Nedo Azzini | ... | set designer |
| Román Calatayud | ... | set designer (as Roman Calatayud) |
| Alessandro De Santis | ... | assistant production designer |
Sound Department
| Mario Ligobbi | ... | sound (as Mario Li Gobbi) |
Camera and Electrical Department
| Antonio Benetti | ... | still photographer (as Tonino Benetti) |
| Giovanni Bergamini | ... | camera operator (as Gianni Bergamini) |
| Giovanni Bonivento | ... | assistant camera (as Gianni Bonivento) |
Editorial Department
| Concetta Pacini | ... | assistant editor |
Location Management
| Gray Frederickson | ... | location manager: collaborator for USA shooting |
Music Department
| Riz Ortolani | ... | musical director |
| Alessandro Alessandroni | ... | musician: sitar (uncredited) |
| Nino Culasso | ... | musician: trumpet (uncredited) |
| Gino Marinacci | ... | musician: flute (uncredited) |
Script and Continuity Department
| Vittoria Vigorelli | ... | continuity |
Additional Crew
| Raffaele Mottola | ... | dialogue coach (as Ray Mottola) |
| N.W. Russo | ... | presenter |
| Paolo Vandini | ... | production secretary |
| Nino Dal Fabbro | ... | voice dubbing: Alberto de Mendoza (uncredited) |
| Gabriella Genta | ... | voice dubbing: Elsa Martinelli (uncredited) |
| Laura Gianoli | ... | voice dubbing: Marisa Mell (uncredited) |
| Antonio Guidi | ... | voice dubbing: Bill Vanders (uncredited) |
| Dario Penne | ... | voice dubbing: Jean Sobieski (uncredited) |
| Giorgio Piazza | ... | voice dubbing: Jean Sorel (uncredited) |
| Sergio Rossi | ... | voice dubbing: John Ireland (uncredited) |
