| Music |
| Francis Lai (music composed by), Joseph Gershenson (music supervision by)
|
| Writer |
| James P. Bonner (screenplay by)
|
| Director of Photography |
| Piero Portalupi (director of photography - A.S.C.), Cesare Allione (camera operator)
|
| Editor |
| J. Terry Williams (film editor)
|
| Art Direction |
| Alexander Golitzen (art directors), Frank Arrigo (art directors), Aurelio Crugnola (and (art directors)), John McCarthy (set decorations), Ferdinando Ruffo (set decorations)
|
| Sound |
| Waldon O. Watson (sound), Kurt Doubrawsky (sound - als Kurt Doubravsky)
|
| 1. Assistant director |
| Tony Brandt (assistant director)
|
| Casting |
| Paola Rolli (casting by), John Merrick (London casting by)
|
| Make up |
| Bud Westmore (make-up), Giuseppe Banchelli (make-up), Cesare Gambarelli (make-up)
|
| Hair stylist |
| Larry Germain (hair stylists - als Larry Germaine), Vasco Reggiani (hair stylists)
|
| Costumes |
| Edith Head (costumes designed by)
|
| Story |
| Stanley Ellin (from the novel by)
|
| Costumes |
| Itala Scandariato (wardrobe)
|
| Producer |
| Fred S. Wallach (unit production manager), Milton Friedman (production manager), David A. Hammond (assistant to the producer), Dick Berg (produced by)
|
| Director |
| John Guillermin (directed by)
|
