Directed by
| Antonio Román | ... | (as Anthony Roman) |
| Mario Bava | ... | (uncredited) |
Writing Credits
| Jesús Navarro Carrión | ... | (story) (as Jesus Navarro) and |
| Antonio Román | ... | (story) (as Antonio Roman) |
| Jesús Navarro Carrión | ... | (screenplay) (as Jesus Navarro) and |
| Antonio Román | ... | (screenplay) (as Antonio Roman) and |
| Adriano Bolzoni | ... | (screenplay) |
| Adriano Bolzoni | ... | (dialogue) and |
| Grazia Benedetti | ... | (dialogue) |
Cast (in credits order)
| Ken Clark | ... | Ringo / Nebraska | |
 |
Yvonne Bastien | ... | Kay Hillmann |
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Piero Lulli | ... | Bill Carter (as Peter Carter) |
| Howard Ross | ... | Lou Felton (as Red Ross) | |
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Alfonso Rojas | ... | Marthy Hillmann |
| Antonio Gradoli | ... | Brack, the Bartender (as Anthony Gradwell) | |
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Francisco Sanz | ... | Dottor Parson (as Paco Sanz) |
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Livio Lorenzon | ... | Sheriff Bert (as Charles Lawrence) |
| Renato Terra | |||
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Ángel Ortiz | ... | Hanck Dewey (as Angel Ortiz) |
| José Canalejas | ... | Elmer Dowson | |
| Frank Braña | ... | Dickson (as Frank Brana) | |
| Rest of cast listed alphabetically: | |||
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Simón Arriaga | ... | Tedder (uncredited) |
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Alfonso de la Vega | ... | Hollander (uncredited) |
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Guillermo Méndez | ... | Manuel (uncredited) |
Produced by
| Fulvio Lucisano | ... | producer |
Music by
| Nino Oliviero | ||
Cinematography by
| Guglielmo Mancori | ... | director of photography |
| Mario Bava | ... | (uncredited) |
Editing by
| Renato Cinquini | ||
| Antonio Gimeno | ||
Set Decoration by
| Gastone Carsetti | ||
| Augusto Lega | ||
Costume Design by
| Rafael Abienzo | ... | (as Rafael Arienzo) |
Makeup Department
| Romana González | ... | hair stylist (as Romana Gonzales) |
| Italia Marini | ... | hair stylist |
| Giuseppe Peruzzi | ... | makeup artist |
| José Luis Ruiz | ... | makeup artist (as Jose' Luis Ruiz) |
Production Management
| Alberto de Cienfuegos | ... | production manager (as Alberto Cinfuegos) |
| Mario Silvestri | ... | general organization |
| José María Téllez | ... | production inspector (as Jose' M. Tellez) |
| Lucio Zarini | ... | production inspector |
Second Unit Director or Assistant Director
| Lamberto Bava | ... | assistant director |
| José Manuel García de la Rasilla | ... | assistant director (as J. Manuel de la Rasilla) |
Sound Department
| Pietro Spadoni | ... | sound |
Special Effects by
| Mario Bava | ... | matte paintings (uncredited) |
Camera and Electrical Department
| Miguel Gassido | ... | assistant camera |
| Remo Grisanti | ... | assistant camera |
| Manuel Martínez | ... | still photographer (as Manuel Martinez) |
| Félix Mirón | ... | camera operator (as Felix Miron) |
| Mario Sbrenna | ... | camera operator |
| Nino Serafini | ... | still photographer |
| Antonio Rinaldi | ... | gaffer (uncredited) |
Costume and Wardrobe Department
| Adriana Spadaro | ... | costume assistant |
Editorial Department
| Romana Fortini | ... | assistant editor |
Music Department
| Robby Poitevin | ... | orchestra director |
Script and Continuity Department
| Gloria Roldán | ... | script supervisor (as Gloria Argueta Roldan) |
| Rosalba Scavia | ... | script supervisor |
| Andrés Vich | ... | script supervisor (uncredited) |
Additional Crew
| Carlos Catán | ... | production secretary (as Carlos Chaves) |
| Maurizio Marvisi | ... | production secretary |
| Mario Bardella | ... | voice dubbing: Livio Lorenzon (uncredited) |
| Noemi Gifuni | ... | voice dubbing: Yvonne Bastien (uncredited) |
| Antonio Guidi | ... | voice dubbing: Piero Lulli (uncredited) |
| Renato Izzo | ... | voice dubbing: Howard Ross (uncredited) |
| Giorgio Piazza | ... | voice dubbing: Alfonso Rojas (uncredited) |
| Sergio Rossi | ... | voice dubbing: Ken Clark (uncredited) |
