| Person | Type | Job | Role(s) |
|---|---|---|---|
 Anne V. Coates | Crew | Editing | Editor |
 Anthony Masters | Crew | Art | Production Design |
 Antônio Carlos Jobim | Crew | Sound | Music |
 Aurelio Crugnola | Crew | Art | Art Direction |
 Claude Renoir | Crew | Camera | Director of Photography |
Cliff Richardson | Crew | Crew | Special Effects |
Connie Willis | Crew | Directing | Script Supervisor |
Franco Fumagalli | Crew | Art | Set Decoration |
 Harold Robbins | Crew | Writing | Novel |
Harry Pottle | Crew | Art | Art Direction |
Jack Maxsted | Crew | Art | Art Direction |
John Harris | Crew | Camera | Camera Operator |
John Hoesli | Crew | Art | Art Direction |
 Lewis Gilbert | Crew | Writing | Screenplay, Director, Producer |
Peter T. Davies | Crew | Sound | Sound Recordist |
Stuart Freeborn | Crew | Costume & Make-Up | Makeup Artist |
Vernon Dixon | Crew | Art | Set Decoration |
Vernon Harris | Crew | Writing | Script Editor |
Michael Hastings | Crew | Writing | Screenplay |
Amalia Paoletti | Crew | Costume & Make-Up | Hairstylist |
Ronald Paterson | Crew | Costume & Make-Up | Costume Design |
Nilo Jacoponi | Crew | Costume & Make-Up | Makeup Artist |
 Alan Badel | Cast | Actor | President Rojo |
 Allan Cuthbertson | Cast | Actor | Hugh |
 Angela Scoular | Cast | Actress | Denisonde |
 Anna Moffo | Cast | Actress | Dania Leonardi |
 Bekim Fehmiu | Cast | Actor | Dax Xenos |
 Candice Bergen | Cast | Actress | Sue Ann Daley |
 Charles Aznavour | Cast | Actor | Marcel Campion |
 Christian Roberts | Cast | Actor | Robert |
 Delia Boccardo | Cast | Actress | Caroline de Coyne |
 Ernest Borgnine | Cast | Actor | Fat Cat |
 Ferdy Mayne | Cast | Actor | Sergei's Father |
 Fernando Rey | Cast | Actor | Jaime Xenos |
 Jaclyn Smith | Cast | Actress | Belinda |
 John Ireland | Cast | Actor | Mr.James Hadley |
 Jorge Martínez de Hoyos | Cast | Actor | El Condor |
 Katia Christine | Cast | Actress | Natalia (as Katia Christina) |
 Leigh Taylor-Young | Cast | Actress | Amparo Rojo |
 Loris Loddi | Cast | Actor | Young Dax |
 Michael Balfour | Cast | Actor | Detective |
 Milena Vukotić | Cast | Actress | April Stavronis |
 Nadia Scarpitta | Cast | Giulia (uncredited) | |
 Olivia de Havilland | Cast | Actress | Deborah Hadley |
 Peter Graves | Cast | Actor | Trustee Banker |
 Rossano Brazzi | Cast | Actor | Baron de Coyne |
 Sydney Tafler | Cast | Actor | Col. Gutierrez (as Sidney Tafler) |
 Thommy Berggren | Cast | Actor | Sergei Nikovitch |
 Yolande Donlan | Cast | Actress | Mrs. Erickson |
 Yorgo Voyagis | Cast | Actor | El Lobo |
| Person | Type | Job | Role(s) |
