Directed by
| Sergio Sollima | ... | (as Simon Sterling) |
Writing Credits (in alphabetical order)
| Jesús María de Arozamena | ... | (screenplay) |
| Giovanni Simonelli | ... | (screenplay) (as Simon O'Neil) |
| Sergio Sollima | ... | (screenplay) (as Simon Sterling) |
Cast (in credits order)
| George Ardisson | ... | Walter Ross, Agent 3S3 | |
| Frank Wolff | ... | Ivan Mikhailovic | |
| Evi Marandi | ... | Melissa Shaw, british agent | |
| Michel Lemoine | ... | Radek | |
| Fernando Sancho | ... | General Emilio Siqueiros | |
| Luz Márquez | ... | Signora Barrientos | |
| Eduardo Fajardo | ... | Professor Theodore Karleston | |
 |
Leontine Snell | ... | Josefa (as Leontine May) |
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Claudio Ruffini | ... | Koko, uomo di Radek (as Claude Ruffin) |
| Sal Borgese | ... | Paco (as Salvatore Borgese) | |
| Manolita Barroso | ... | (as María Granada) | |
| Porfiria Sanchíz | ... | (as Porfiria Sanchez) | |
| John Karlsen | ... | Mikhailovic's Boss | |
| Kitty Swan | ... | Una dell'harem di Siqueiros (as Kersten Svanhold) | |
| Beni Deus | ... | (as Beny Deus) | |
| Luis Induni | ... | Micheal Smith, agente 3S4 | |
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Dina Loy | ||
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Ursula Rank | ||
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Frank Castle | ||
| José Riesgo | |||
| Rest of cast listed alphabetically: | |||
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Ennio Antonelli | ... | Man on Plane |
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Pietro Ceccarelli | ... | Soldier |
| Nello Pazzafini | ... | José, Bodyguard | |
| Romano Puppo | ... | Man on Plane #2 | |
| Pietro Torrisi | ... | Bodyguard #2 | |
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Giuliano Dell'Ovo | ... | Koko Henchman (uncredited) |
Music by
| Piero Umiliani | ||
Cinematography by
| Carlo Carlini | ||
Editing by
| José Luis Matesanz | ||
| Bruno Mattei | ... | (as Jordan B. Matthews) |
Production Design by
| Mary Jo Lewis | ||
Set Decoration by
| Carlo Gervasi | ... | (as Charles Jerwis) |
| Ramiro Gómez | ||
Costume Design by
| Maria Pia Cohen | ||
Makeup Department
| Francisco Cerco | ... | hair stylist |
| Francisco Ramón Ferrer | ... | makeup artist |
| Dolores Hidalgo | ... | assistant makeup artist |
| Tony Mayfield | ... | makeup artist (as Tony Mayfield Jr.) |
Production Management
| Luis Berraquero | ... | unit manager |
| Mario Damiani | ... | production manager (as Marc Damian) |
| Marciano de la Fuente | ... | production manager |
Second Unit Director or Assistant Director
| Maurizio Mein | ... | assistant director |
Art Department
| José Panero | ... | property master |
| Rafael Pérez Murcia | ... | assistant set decorator |
Stunts
| Elio Bonadonna | ... | stunts (uncredited) |
| Sal Borgese | ... | stunt actor (uncredited) |
| Giuliano Dell'Ovo | ... | stunts (uncredited) |
Camera and Electrical Department
| Luis Berraquero | ... | assistant camera |
| Salvador Gil | ... | camera operator |
| Domingo Solano | ... | assistant camera |
| Julio Sánchez Caballero | ... | still photographer |
Costume and Wardrobe Department
| Carmen Hernández | ... | seamstress |
Editorial Department
| Enrique Agulló | ... | assistant editor |
| José Luis Matesanz | ... | editor: Spanish version |
Music Department
| Carol Danell | ... | composer: song "Trouble Galore" |
Script and Continuity Department
| Mary Springfield | ... | script supervisor |
Additional Crew
| María Teresa Font | ... | shooting secretary |
| José Fábregas | ... | production trainee |
| José María Maldonado | ... | production trainee |
| Joaquín Serrano | ... | production assistant |
| Giorgio Capecchi | ... | voice dubbing: Fernando Sancho (uncredited) |
| Emilio Cigoli | ... | voice dubbing: Tom Felleghy (uncredited) |
| Luciano De Ambrosis | ... | voice dubbing: Dakar (uncredited) |
| Gualtiero De Angelis | ... | voice dubbing: José Marco (uncredited) |
| Maria Pia Di Meo | ... | voice dubbing: Bruna Simionato (uncredited) |
| Mario Feliciani | ... | voice dubbing: Antonio Gradoli (uncredited) |
| Sergio Graziani | ... | voice dubbing: Giorgio Ardisson (uncredited) |
| Bruno Persa | ... | voice dubbing: Francisco Sanz (uncredited) |
| Giuseppe Rinaldi | ... | voice dubbing: Franco Andrei (uncredited) |
| Rita Savagnone | ... | voice dubbing: Seyna Seyn (uncredited) |
| Renato Turi | ... | voice dubbing: Georges Rivière (uncredited) |
