In 19th century London, a sex maniac sneaks into the engagement party of Dr. Henry Jekyll and Miss Fanny Osbourne, turning the event into a nightmarish whirlpool of murder and debauchery.
| Actor | Role |
|---|---|
 Udo KierDr. Henry Jekyll | Dr. Henry Jekyll |
 Marina PierroMiss Fanny Osbourne | Miss Fanny Osbourne |
 Gérard ZalcbergMr. Hyde | Mr. Hyde |
 Patrick MageeGeneral | General |
 Howard VernonDr. Lanyon | Dr. Lanyon |
 Clément HarariReverend Donald Regan | Reverend Donald Regan |
| JJean MylonasMr. Utterson | Mr. Utterson |
| EEugene Braun MunkMr. Enfield | Mr. Enfield |
| LLouis CollaMr. Maw | Mr. Maw |
| CCatherine CosteMrs. Enfield | Mrs. Enfield |
 Rita MaidenLady Osbourne, Fanny's mother | Lady Osbourne, Fanny's mother |
| MMichèle MazeNot listed | Not listed |
 Agnès DaemsCharlotte Carew, the General's daughter | Charlotte Carew, the General's daughter |
| MMagali NoaroVictoria Enfield, the young dancer | Victoria Enfield, the young dancer |
| DDominique AndersenNot listed | Not listed |
| IIsabelle CagnatLittle girl | Little girl |
 Gisèle PrévilleDr. Jekyll's mother | Dr. Jekyll's mother |