| Person | Type | Job | Role(s) |
|---|---|---|---|
 Alfredo Matas | Crew | Production | Executive Producer |
 Bert Bates | Crew | Editing | Editor |
 Cecilio Paniagua | Crew | Camera | Second Unit Director of Photography |
Deirdre Clancy | Crew | Costume & Make-Up | Costume Design |
Eduardo Noé | Crew | Camera | Camera Operator |
Enrique Alarcón | Crew | Art | Art Direction |
Enrique Molinero | Crew | Sound | Sound |
 Henri Decaë | Crew | Camera | Director of Photography |
Ilya Salkind | Crew | Production | Associate Producer |
John Merrick | Crew | Production | Casting |
José Antonio Sánchez | Crew | Costume & Make-Up | Makeup Artist |
José Manuel M. Herrero | Crew | Production | Production Supervisor |
Juan Estelrich March | Crew | Directing | Second Unit Director |
 Jules Verne | Crew | Writing | Novel |
Julio Sempere | Crew | Directing | Assistant Director |
 Kevin Billington | Crew | Directing | Director |
 Kirk Douglas | Crew | Production | Producer |
Manolo Mampaso | Crew | Costume & Make-Up | Costume Design |
 Piero Piccioni | Crew | Sound | Original Music Composer |
Teddy Mason | Crew | Sound | Sound Editor |
Tom Rowe | Crew | Writing | Screenplay |
Ramón de Diego | Crew | Costume & Make-Up | Makeup Artist |
Antonio Molina | Crew | Crew | Special Effects |
Josefa Rubio | Crew | Costume & Make-Up | Hairstylist |
Rachel Billington | Crew | Crew | Additional Dialogue, Writer |
Jane Buck | Crew | Directing | Continuity |
Francisco Romero | Crew | Production | Production Manager |
Richard M. Parker | Crew | Crew | Special Effects |
 Aldo Sambrell | Cast | Actor | Tarcante (as Aldo Sanbrell) |
Alejandro de Enciso | Cast | Morabbito | |
Antonio Rebollo | Cast | Actor | Santos (as Tony Skios) |
 Fernando Rey | Cast | Actor | Captain Moriz |
 Jean-Claude Drouot | Cast | Actor | Virgilio |
 Juan Cazalilla | Cast | Actor | Captain Lafayette |
Kirk Douglas | Cast | Actor | Will Denton |
 Luis Barboo | Cast | Actor | Calsa Larga (as Luis Bar Boo) |
 Massimo Ranieri | Cast | Actor | Felipe |
Oscar Davis | Cast | Amador | |
Raúl Castro | Cast | Actor | Malapinha |
 Renato Salvatori | Cast | Actor | Montefiore |
 Samantha Eggar | Cast | Actress | Arabella |
 Tito García | Cast | Actor | Emilio (as Tito Garcia) |
 Tony Cyrus | Cast | Actor | Valgolyo |
 Víctor Israel | Cast | Actor | Das Mortes (as Victor Israel) |
 Yul Brynner | Cast | Actor | Jonathan Kongre |
Martin Uviente | Cast | Balduino (as Martin Uvience) | |
John Clark | Cast | Matt | |
Maria Borge | Cast | Emily Jane | |
| Person | Type | Job | Role(s) |
