| Person | Type | Job | Role(s) |
|---|---|---|---|
 Antonio Scaramuzza | Crew | Camera | Assistant Camera |
 Armando Trovajoli | Crew | Sound | Original Music Composer |
Bruno Moreal | Crew | Sound | Sound Mixer |
 Ennio Guarnieri | Crew | Camera | Director of Photography |
Franco Bruni | Crew | Camera | Camera Operator |
 Castellano | Crew | Writing | Idea |
Gianfranco Mecacci | Crew | Costume & Make-Up | Makeup Artist |
 Pipolo | Crew | Writing | Idea |
Lamberto Palmieri | Crew | Production | Unit Manager |
 Leonardo Benvenuti | Crew | Writing | Screenplay, Story |
 Luciano Martino | Crew | Production | Producer |
Luciano Spadoni | Crew | Art | Production Design |
Massimo Tavazzi | Crew | Art | Set Decoration |
Mirella Ginnoto | Crew | Costume & Make-Up | Hairstylist |
 Piero De Bernardi | Crew | Writing | Screenplay, Story |
 Raimondo Crociani | Crew | Editing | Editor |
Renato Jaboni | Crew | Production | Executive Producer |
 Robert Louis Stevenson | Crew | Writing | Novel |
 Sergio Salvati | Crew | Camera | Director of Photography |
 Steno | Crew | Writing | Screenplay, Director, Story |
Elisabetta Poccioni | Crew | Costume & Make-Up | Costume Design |
Marisa Crimi | Crew | Costume & Make-Up | Costume Design |
Giovanni Manganelli | Crew | Writing | Co-Writer, First Assistant Director |
Marina Mattoli | Crew | Directing | Script Supervisor |
Franco Schioppa | Crew | Costume & Make-Up | Makeup Artist |
Carlo Bartolini | Crew | Production | Production Manager |
Francesco Narducci | Crew | Camera | Still Photographer |
Sergio Gennari | Crew | Costume & Make-Up | Hairstylist |
Maurizio Lucchini | Crew | Camera | Assistant Camera |
Renato Ranieri | Crew | Camera | Camera Operator |
Massimo Iabone | Crew | Sound | Sound |
Lucia Nolano | Crew | Production | Production Secretary |
Leonardo Curreri | Crew | Production | Administration |
Pina Triunveri | Crew | Editing | Assistant Editor |
 Angelo Boscariol | Cast | Actor | PANTAC Board Member (uncredited) |
 Edwige Fenech | Cast | Actress | Barbara Wimply |
 Eolo Capritti | Cast | Actor | Henchman |
 Fulvio Mingozzi | Cast | Actor | PANTAC Board Member (uncredited) |
 Geoffrey Copleston | Cast | Actor | Archibald Gold |
 Gianrico Tedeschi | Cast | Actor | James / Jeeves |
 Giuseppe Marrocco | Cast | Actor | PANTAC Board Member (uncredited) |
 Gordon Mitchell | Cast | Actor | Pretorius |
 Guerrino Crivello | Cast | Actor | Student |
 Juba Kennerley | Cast | Actor | Gentleman (uncredited) |
 Luciano Foti | Cast | Actor | Class Member (uncredited) |
 Luciano Zanussi | Cast | Actor | PANTAC Board Member (uncredited) |
Paola Arduini | Cast | Stewardess | |
 Paolo Paoloni | Cast | Actor | Professor |
 Paolo Villaggio | Cast | Actor | Dr. Jekyll / Mr Hyde |
 Alfonso Giganti | Cast | Actor | Industrialist (uncredited) |
Walter Williams | Cast | PANTAC Top President | |
 Francesco Anniballi | Cast | Actor | Henchman |
 Clemente Ukmar | Cast | Henchman | |
 Alessandro Tedeschi | Cast | Actor | Professor introducing Jekyll (uncredited) |
| Person | Type | Job | Role(s) |
