Ostend, Belgium. In a decadent seaside hotel, Stefan and Valerie, a newlywed couple, meet the mysterious Countess Báthory and Ilona, her secretary.
Unfortunately the movie Daughters of Darkness is not yet available on HBO Max.
| Directing | Harry Kümel | Director |
| Production | Paul Collet | Producer |
| Production | Henry Lange | Producer |
| Sound | François de Roubaix | Original Music Composer |
| Camera | Eduard van der Enden | Director of Photography |
| Editing | Denis Bonan | Editor |
| Editing | August Verschueren | Editor |
| Art | Françoise Hardy | Art Direction |
| Costume & Make-Up | Alexandre de Paris | Hairstylist |
| Sound | François de Roubaix | Conductor |
| Writing | Harry Kümel | Screenplay |
| Writing | Jean Ferry | Screenplay |
| Writing | Pierre Drouot | Screenplay |
| Production | Alain-C. Guilleaume | Associate Producer |
| Production | Pierre Drouot | Associate Producer |
| Production | Alain-C. Guilleaume | Executive Producer |
| Production | Erwin Gitt | Production Manager |
| Production | Jean-Marie Bertrand | Production Manager |
| Production | Paul Collet | Location Manager |
| Art | Willy Dellaert | Property Master |
| Production | Michèle Mehary | Production Secretary |
| Costume & Make-Up | Bernard Perris | Costume Designer |
| Costume & Make-Up | Ulli Ullrich | Makeup Artist |
| Costume & Make-Up | Pascale Kellen | Assistant Makeup Artist |
| Costume & Make-Up | Marie-Paule Petignot | Wardrobe Supervisor |
| Sound | Jacques Eippers | Sound Mixer |
| Sound | Henri Morelle | Boom Operator |
| Sound | Hans W. Kranski | Sound Effects |
| Art | Henri Roesems | Set Dresser |
| Camera | Virginia Leirens | Still Photographer |
| Camera | Jan van Gastel | Still Photographer |
| Directing | Paul Arias | First Assistant Director |
| Directing | Jean-Marc Turine | Second Assistant Director |
| Directing | Magda Reypens | Script Supervisor |
| Editing | Daniel Devalk | Assistant Editor |
| Editing | Edith Shumann | Assistant Editor |
| Crew | Eugène Hendrickx | Special Effects |
| Crew | Thierry Hallard | Special Effects |
| Camera | Bob Lessennes | Key Grip |
| Lighting | Claude Decubber | Gaffer |
