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Paul Naschy as Waldemar Daninsky / Wolfman / Mr. Hyde |
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Shirley Corrigan as Justine |
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Jack Taylor as Dr. Henry Jekyll |
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Mirta Miller as Sandra |
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José Marco as Imre Kosta |
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Luis Induni as Otvos |
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Barta Barri as Gyogyo, the inn-keeper |
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Luis Gaspar as Thurko, Otvos's thug |
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Elsa Zabala as Uswika Bathory |
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Lucy Tiller as Whore |
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Montserrat Julió as Agatha (uncredited) |
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Marisol Delgado as Nurse / Victim (uncredited) |
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María Luisa Tovar as Streetwalker / Victim (uncredited) |
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Heinrich Starhemberg as Party Guest (uncredited) |
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Jorge Vico as |
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Adolfo Thous as (as Adolfo Tohus) |
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Simón Ramírez Fernández as Waldemar Daninsky (voice) (uncredited) |
| Directing | León Klimovsky | Director |
| Writing | Paul Naschy | Screenplay |
| Writing | Paul Naschy | Story |
| Production | Alfredo Fraile | Executive Producer |
| Production | Arturo González | Producer |
| Sound | Antón García Abril | Original Music Composer |
| Camera | Francisco Fraile | Director of Photography |
| Editing | Petra de Nieva | Editor |
| Crew | Miguel Sesé | Makeup Effects |
| Art | José Algueró | Set Decoration |
| Costume & Make-Up | Miguel Sesé | Makeup Artist |
| Crew | Antonio Molina | Special Effects |
