Réalisation: Steno
Les dirigeants d'une multinationale pétrochimique font appel au docteur Jekyll pour une campagne mondiale, destinée à prôner un chewing-gum qui va propager la maladie. Compromettre le fils de la reine d'Angleterre serait un bon moyen pour obliger Sa Gracieuse Majesté à faire de la publicité télévisée pour la gomme en question. Mais l'ancêtre de Jekyll, le grand-père Hyde, veille.
Paolo Villaggio
Dr. Jekyll / Mr Hyde
Edwige Fenech
Barbara Wimply
Gianrico Tedeschi
James / Jeeves
Gordon Mitchell
Pretorius
Paolo Paoloni
Professor
Guerrino Crivello
Student
Eolo Capritti
Henchman
Francesco Anniballi
Henchman
Walter Williams
PANTAC Top President
Clemente Ukmar
Henchman
Geoffrey Copleston
Archibald Gold
Paola Arduini
Stewardess
Angelo Boscariol
PANTAC Board Member (uncredited)
Luciano Foti
Class Member (uncredited)
Alfonso Giganti
Industrialist (uncredited)
Juba Kennerley
Gentleman (uncredited)
Giuseppe Marrocco
PANTAC Board Member (uncredited)
Fulvio Mingozzi
PANTAC Board Member (uncredited)
Alessandro Tedeschi
Professor introducing Jekyll (uncredited)
Luciano Zanussi
PANTAC Board Member (uncredited)
Paolo Villaggio
Dr. Jekyll / Mr Hyde
Edwige Fenech
Barbara Wimply
Gianrico Tedeschi
James / Jeeves
Gordon Mitchell
Pretorius
Paolo Paoloni
Professor
Guerrino Crivello
Student
Eolo Capritti
Henchman
Francesco Anniballi
Henchman
Walter Williams
PANTAC Top President
Clemente Ukmar
Henchman
Geoffrey Copleston
Archibald Gold
Paola Arduini
Stewardess
Angelo Boscariol
PANTAC Board Member (uncredited)
Luciano Foti
Class Member (uncredited)
Alfonso Giganti
Industrialist (uncredited)
Juba Kennerley
Gentleman (uncredited)
Giuseppe Marrocco
PANTAC Board Member (uncredited)
Fulvio Mingozzi
PANTAC Board Member (uncredited)
Alessandro Tedeschi
Professor introducing Jekyll (uncredited)
Luciano Zanussi
PANTAC Board Member (uncredited)
Paolo Villaggio
Dr. Jekyll / Mr Hyde
Edwige Fenech
Barbara Wimply
Gianrico Tedeschi
James / Jeeves
Gordon Mitchell
Pretorius
Paolo Paoloni
Professor
Guerrino Crivello
Student
Eolo Capritti
Henchman
Francesco Anniballi
Henchman
Walter Williams
PANTAC Top President
Clemente Ukmar
Henchman
Geoffrey Copleston
Archibald Gold
Paola Arduini
Stewardess
Angelo Boscariol
PANTAC Board Member (uncredited)
Luciano Foti
Class Member (uncredited)
Alfonso Giganti
Industrialist (uncredited)
Juba Kennerley
Gentleman (uncredited)
Giuseppe Marrocco
PANTAC Board Member (uncredited)
Fulvio Mingozzi
PANTAC Board Member (uncredited)
Alessandro Tedeschi
Professor introducing Jekyll (uncredited)
Luciano Zanussi
PANTAC Board Member (uncredited)