Directed by
| Aldo Lado | ... | (as George B. Lewis) |
| Enzo G. Castellari | ... | (opening sequence) (uncredited) |
Writing Credits
| Adriano Bolzoni | ... | (story) |
| Adriano Bolzoni | ... | (screenplay) & |
| Aldo Lado | ... | (screenplay) |
| Garry Rusoff | ... | (uncredited) |
Cast (in credits order) verified as complete
| Richard Kiel | ... | Golob | |
| Corinne Cléry | ... | Barbara Gibson (as Corinne Clery) | |
| Leonard Mann | ... | Nick | |
 |
Ivan Rassimov | ... | Lord Graal |
| Massimo Serato | ... | Great Brother | |
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Marco Yeh | ... | Tom Tom |
| Arthur Kennedy | ... | Dr. Kraspin | |
| Barbara Bach | ... | Lady Agatha | |
| Venantino Venantini | |||
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Vito Fornari | ||
| José Quaglio | ... | (as Giuseppe Quaglio) | |
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Attilio Duse | ||
| Rest of cast listed alphabetically: | |||
| Ottaviano Dell'Acqua | ... | Technician (uncredited) | |
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Larry Dolgin | ... | Narrator (voice) (uncredited) |
|
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Ulla Johannsen | ... | Girl who is drained of blood (uncredited) |
| Hal Yamanouchi | ... | Humanoid Soldier (uncredited) | |
Produced by
| Giorgio Venturini | ... | producer |
Music by
| Ennio Morricone | ||
Cinematography by
| Silvano Ippoliti | ... | (photography) |
Editing by
| Mario Morra | ||
Production Design by
| Enzo Bulgarelli | ||
Costume Design by
| Luca Sabatelli | ||
Makeup Department
| Giannetto De Rossi | ... | makeup artist |
| Mirella De Rossi | ... | hair stylist (as Mirella Sforza) |
| Maurizio Trani | ... | assistant makeup artist |
Production Management
| Vittorio Biferale | ... | production supervisor |
| Cecilia Bigazzi | ... | production manager |
| Lillo Capoano | ... | post-production supervisor |
| Arduino Mercuri | ... | production supervisor |
| Giuliano Principato | ... | production supervisor |
| Viero Spadoni | ... | production supervisor |
Second Unit Director or Assistant Director
| Enzo G. Castellari | ... | second unit director (as Enzo Castellari) |
| Walter Italici | ... | second assistant director |
| Nello Vanin | ... | first assistant director |
Art Department
| Alessandro Alberti | ... | assistant production designer |
| Giacomo Calò Carducci | ... | assistant production designer |
| Stefano Maria Ortolani | ... | assistant production designer (as Stefano Ortolani) |
| Giuseppe Ranieri | ... | assistant production designer |
Sound Department
| Luciano Anzellotti | ... | sound effects |
| Massimo Anzellotti | ... | sound editor |
| Ugo Celani | ... | sound |
| Romano Checcacci | ... | dubbing mixer |
| Armando Janota | ... | boom operator |
Special Effects by
| Antonio Margheriti | ... | special effects supervisor (as Antony M. Dawson) |
| Germano Natali | ... | pyrotechnician |
| Armando Valcauda | ... | special effects |
Visual Effects by
| Ermando Biamonte | ... | optical effects (as Ermanno Biamonte) |
| Sandro Danielli | ... | models |
| Angelo Galante | ... | models |
| Jan Jacobsen | ... | process photography (as Jan W. Jacobsen) |
| Emilio Ruiz del Río | ... | models (as Emilio Ruiz) |
| Paolo Zeccara | ... | model maker |
Stunts
| Ottaviano Dell'Acqua | ... | stunts |
| Rocco Lerro | ... | stunt arranger |
| Angelo Ragusa | ... | stunts |
| Goffredo Unger | ... | stunt arranger (as Freddy Unger) |
| Hal Yamanouchi | ... | stunt performer (uncredited) |
Camera and Electrical Department
| Giovanni Bergamini | ... | photography: second unit (as Gianni Bergamini) |
| Bruno Bruni | ... | still photographer |
| Franco Bruni | ... | camera operator |
| Philip Ceccon | ... | assistant camera |
| Luigi Conversi | ... | assistant camera |
| Ettore Corso | ... | assistant camera |
| Federico Del Zoppo | ... | camera operator |
| Enrico Fontana | ... | assistant camera |
| Giancarlo Granatelli | ... | assistant camera |
| Angelo Lotti | ... | photography: second unit |
| Enrico Sasso | ... | camera operator |
| Fabrizio Vicari | ... | assistant camera |
Costume and Wardrobe Department
| Nadia Vitali | ... | wardrobe supervisor |
Editorial Department
| Mario D'Ambrosio | ... | second assistant editor |
| Massimo Quaglia | ... | first assistant editor |
| Stefano Quaglia | ... | assistant editor |
| Aurelio Tirimagni | ... | assistant editor |
Music Department
| Ennio Morricone | ... | conductor |
| Leandro Leandri | ... | music engineer (uncredited) / music mixer (uncredited) |
| Ennio Morricone | ... | orchestrator (uncredited) |
Script and Continuity Department
| Giuseppe Giglietti | ... | script supervisor |
| Liliana Ginanneschi | ... | script supervisor |
| Flavia Sante Vanin | ... | script supervisor (as Flavia Vanin) |
Additional Crew
| Enrico Lucherini | ... | publicist |
| Bruno Alessandro | ... | voice dubbing: Arthur Kennedy (uncredited) |
| Emanuela Fallini | ... | voice dubbing: Corinne Cléry (uncredited) |
| Noemi Gifuni | ... | voice dubbing: Barbara Bach (uncredited) |
| Giuppy Izzo | ... | voice dubbing: Marco Yeh (uncredited) |
| Michele Kalamera | ... | voice dubbing: Massimo Serato (uncredited) |
| Carlo Sabatini | ... | voice dubbing: Leonard Mann (uncredited) |
