When his experiments into a powerful new anesthetic go hideously awry, respected physician Dr. Jekyll transforms into the hideous Jack Hyde. As his wife Elisabeth passes her time in charitable work, rehabilitating the district's fallen women, Hyde is drawn into an escalating cycle of lust and murder that seems to know no bounds.
| Directing | Gérard Kikoïne | Director |
| Production | Jacques Fiorentino | Producer |
| Editing | Malcolm Cooke | Editor |
| Art | Jean Charles Dedieu | Production Design |
| Production | Maggie Sanguin | Casting |
| Production | Maria Rohm | Associate Producer |
| Production | Peter A. McRae | Executive Producer |
| Camera | Tony Spratling | Director of Photography |
| Writing | J.P. Félix | Screenplay |
| Writing | Ron Raley | Screenplay |
| Production | James Swann | Associate Producer |
| Production | Harry Alan Towers | Producer |
| Production | Edward Simons | Producer |
| Sound | Frédéric Talgorn | Original Music Composer |
| Writing | Robert Louis Stevenson | Novel |
| Crew | Edward Simons | Additional Writing |
| Art | Fred Carter | Art Direction |
| Costume & Make-Up | Valerie L'Annee | Wardrobe Designer |
