Directed by
| Ubaldo Ragona | ... | (as Ubaldo B. Ragona) (Italian prints) |
| Sidney Salkow | ... | (U.S. prints) |
Writing Credits
| Richard Matheson | ... | (screenplay) (as Logan Swanson) and |
| William F. Leicester | ... | (screenplay) |
| Richard Matheson | ... | (novel) |
| Furio M. Monetti | ... | (screenplay) (Italian version) and |
| Ubaldo Ragona | ... | (screenplay) (Italian version) (as Ubaldo B. Ragona) |
Cast (in credits order) verified as complete
| Vincent Price | ... | Dr. Robert Morgan | |
| Franca Bettoia | ... | Ruth Collins | |
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Emma Danieli | ... | Virginia Morgan |
| Giacomo Rossi Stuart | ... | Ben Cortman (as Giacomo Rossi-Stuart) | |
| Umberto Raho | ... | Dr. Mercer (as Umberto Rau) | |
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Christi Courtland | ... | Kathy Morgan |
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Antonio Corevi | ... | Governor (as Tony Corevi) |
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Ettore Ribotta | ... | TV Reporter (as Hector Ribotta) |
| Rest of cast listed alphabetically: | |||
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Rolando De Rossi | ... | TV Reporter (uncredited) |
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Vito Fasano | ... | Man Chasing Morgan (uncredited) |
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Giuseppe Mattei | ... | New People Leader (uncredited) |
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Enrico Salvatore | ... | TV Reporter (uncredited) |
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Alessandro Tedeschi | ... | Passerby (uncredited) |
Produced by
| Harold E. Knox | ... | associate producer |
| Robert L. Lippert | ... | producer |
Music by
| Paul Sawtell | ||
| Bert Shefter | ||
Cinematography by
| Franco Delli Colli | ... | director of photography |
Editing by
| Gene Ruggiero | ||
| Franca Silvi | ... | (Italian version) |
Production Design by
| Giorgio Giovannini | ||
Set Decoration by
| Brunello Serena Ulloa | ||
Costume Design by
| Angiolina Menichelli | ... | (as Lilly Menichelli) |
Makeup Department
| Piero Mecacci | ... | makeup artist |
Production Management
| Lionello Meucci | ... | assistant production manager |
| Vico Vaccaro | ... | production manager |
| Luciano Volpato | ... | production supervisor |
Second Unit Director or Assistant Director
| Carlo Grandone | ... | assistant director |
Sound Department
| Enzo Silvestri | ... | sound engineer |
| Armando Timpani | ... | sound recordist |
| Bruno Zanoli | ... | boom operator |
Stunts
| Bruno Ariè | ... | stunts (uncredited) |
| Enrico Chiappafreddo | ... | stunts (uncredited) |
Camera and Electrical Department
| Alfonso Avincola | ... | still photographer (uncredited) |
| Angelo Lannutti | ... | assistant camera (uncredited) |
| Alvaro Lanzoni | ... | camera operator (uncredited) |
| Renato Pedrini | ... | chief electrician (uncredited) |
| Federico Tocci | ... | key grip (uncredited) |
Costume and Wardrobe Department
| Carmen Frosali | ... | wardrobe mistress (uncredited) |
Music Department
| Alfonso D'Artega | ... | orchestrator |
| Norman B. Schwartz | ... | music editor (as Norman Schwartz) |
Script and Continuity Department
| Rita Agostini | ... | script supervisor (uncredited) |
Additional Crew
| Cesare Barbetti | ... | italian voice dubbing: Giacomo Rossi Stuart (uncredited) |
| Fiorella Betti | ... | italian voice dubbing: Emma Danieli (uncredited) |
| Emilio Cigoli | ... | italian voice dubbing: Vincent Price (uncredited) |
| Carolyn De Fonseca | ... | english voice dubbing: Franca Bettoia (uncredited) |
| Sergio Graziani | ... | voice dubbing: Enrico Salvatore & Ettore Ribotta & Giuseppe Mattei & Rolando De Rossi (uncredited) |
| Nino Marchetti | ... | italian voice dubbing: Antonio Corevi (uncredited) |
| Bruno Persa | ... | italian voice dubbing: Umberto Raho (uncredited) |
| Franco Rispoli | ... | production secretary (uncredited) |
| Ermete Santini | ... | production secretary (uncredited) |
| Rita Savagnone | ... | italian voice dubbing: Franca Bettoia (uncredited) |