| Person | Type | Job | Role(s) |
|---|---|---|---|
 Arrigo Equini | Crew | Art | Art Direction |
Dudley Lovell | Crew | Camera | Camera Operator |
J.B. Smith | Crew | Sound | ADR Mixer |
Josef Shaftel | Crew | Writing | Story, Producer |
 Ken Annakin | Crew | Directing | Director |
Piero Portalupi | Crew | Camera | Director of Photography |
R.A. MacDonald | Crew | Crew | Special Effects |
Ralph Sheldon | Crew | Editing | Editor |
 Riz Ortolani | Crew | Sound | Original Music Composer |
Sy Salkowitz | Crew | Writing | Writer |
Víctor Merenda | Crew | Directing | Assistant Director |
Italia Scandariato | Crew | Costume & Make-Up | Costume Design |
Kurt Doubrowsky | Crew | Sound | Sound Recordist |
Sy Stewart | Crew | Production | Associate Producer |
Ettore Duranti | Crew | Camera | Grip |
David Hawkins | Crew | Sound | Sound Editor |
 Aldo Bufi Landi | Cast | Actor | Capitano Del Signore |
 Andrea Aureli | Cast | Actor | Carabiniere |
Antonio Corevi | Cast | Actor | Priest at Luigi's Funeral (uncredited) |
 Calisto Calisti | Cast | Actor | Inspector Bordoni |
 Carlo Croccolo | Cast | Actor | Franco |
 Carlo Rizzo | Cast | Actor | Maitre d'Hotel |
 Davy Kaye | Cast | Actor | Davey Collins (as Davey Kaye) |
 Edward G. Robinson | Cast | Actor | Professor Samuels |
 Ermelinda De Felice | Cast | Actress | Emma |
 Femi Benussi | Cast | Actress | Uncle Carlo's Bride |
 Francesco Mulè | Cast | Actor | Antonio Tozzi |
 Giulio Marchetti | Cast | Actor | Lt. Naldi |
 Godfrey Cambridge | Cast | Actor | Benjamin 'Benny' Brownstead |
 Jean-Jacques Delbo | Cast | Actor | Train Engineer (uncredited) |
 Luigi Bonos | Cast | Actor | Old House Owner (uncredited) |
 Mickey Knox | Cast | Actor | Joe Ware |
 Milena Vukotić | Cast | Actress | Angelina Pedrone (uncredited) |
 Nino Musco | Cast | Actor | Chef |
 Nino Vingelli | Cast | Actor | Restaurant Manager (uncredited) |
 Paola Borboni | Cast | Actress | Signora Rosa |
 Piero Gerlini | Cast | Actor | Captain Capuano |
 Raquel Welch | Cast | Actress | Juliana |
 Robert Wagner | Cast | Actor | Harry Price |
Roberto De Simone | Cast | Uncle Carlo | |
 Valéry Inkijinoff | Cast | Actor | Mafia Guy in Sauna (uncredited) |
 Victor Spinetti | Cast | Actor | Captain Giglio |
 Vittorio De Sica | Cast | Actor | Cesare Celli |
 Yvonne Sanson | Cast | Actress | Teresa |
 Romano Milani | Cast | Wedding Guest (uncredited) | |
 Gianna Dauro | Cast | Signora Clara | |
| Person | Type | Job | Role(s) |
