Upon his return from battle in the previous film, the great warrior Hercules learns that his lover, Daianara, has lost her senses. Acording of the oracle Medea, Dianara's only hope is the Stone of Forgetfulness which lies deep in the realm of Hades. Hercules, with two companions, Theseus and Telemachus, embarks on a dangerous quest for the stone, while he is unaware that Dianara's guardian, King Lico, is the one responsible for her condition and plots to have the girl for himself as his bride upon her revival.
Is Hercules in the Haunted World on Netflix? Unfortunately the movie Hercules in the Haunted World is not yet available on Netflix.
| Production | Achille Piazzi | Producer |
| Writing | Sandro Continenza | Screenplay |
| Writing | Duccio Tessari | Screenplay |
| Directing | Mario Bava | Director |
| Writing | Mario Bava | Screenplay |
| Camera | Mario Bava | Director of Photography |
| Directing | Bona Magrini | Script Supervisor |
| Costume & Make-Up | Renzo Francioni | Assistant Makeup Artist |
| Art | Giuseppe Ranieri | Assistant Production Design |
| Camera | Ubaldo Terzano | Camera Operator |
| Camera | Enrico Santelli | Still Photographer |
| Sound | Eugenio Fiori | Boom Operator |
| Sound | Tonino Cacciottolo | Foley Artist |
| Production | Giovanna Pellegrino | Production Secretary |
| Production | Ernesto Poli | Administration |
| Writing | Duccio Tessari | Story |
| Camera | Giuseppe Berta | Assistant Camera |
| Production | Giorgio Baldi | Unit Manager |
| Production | Alfredo Petri | Production Secretary |
| Costume & Make-Up | Maria Luisa Onorati | Seamstress |
| Writing | Sandro Continenza | Story |
| Production | Dino Di Salvo | Production Secretary |
| Writing | Franco Prosperi | Story |
| Art | Tony Sarzi-Braga | Assistant Production Design |
| Sound | Adolfo Fabrizi | Sound Recordist |
| Directing | Franco Prosperi | First Assistant Director |
| Camera | Luciano Brebbia | Assistant Camera |
| Sound | Fausto Ancillai | Sound Mixer |
| Editing | Lina Caterini | Assistant Editor |
| Sound | Nino Renda | Sound Mixer |
| Sound | Luigi Puri | Sound |
| Costume & Make-Up | Silvano Giusti | Assistant Costume Designer |
| Costume & Make-Up | Valeria Sponsali | Seamstress |
| Camera | Joe D'Amato | Camera Operator |
| Writing | Mario Bava | Story |
| Production | Danilo Marciani | Production Manager |
| Costume & Make-Up | Mario Giorsi | Costume Design |
| Costume & Make-Up | Franco Palombi | Makeup Artist |
| Editing | Mario Serandrei | Editor |
| Art | Franco Lolli | Production Design |
| Sound | Armando Trovajoli | Original Music Composer |
| Writing | Franco Prosperi | Screenplay |
| Costume & Make-Up | Nicla Palombi | Hairstylist |
