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Mario Soffici as Dr. Jekyll / Mr. Hyde |
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Ana María Campoy as Sara |
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Olga Zubarry as Lola |
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José Cibrián as Dr. Anderson |
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Federico Mansilla as Dr. Dayon |
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Panchito Lombard as Enriquito |
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Arsenio Perdiguero as Carmelo |
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Rafael Frontaura as Actor |
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Jesús Pampín as Policía |
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Rodolfo Crespi as |
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Gloria Ferrandiz as |
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Martha Atoche as |
| Directing | Mario Soffici | Director |
| Art | Gori Muñoz | Production Design |
| Writing | Carlos Marín | Writer |
| Writing | Ulyses Petit de Murat | Writer |
| Writing | Mario Soffici | Writer |
| Writing | რობერტ ლუის სტივენსონი | Novel |
| Camera | Antonio Merayo | Director of Photography |
| Sound | Silvio Vernazza | Original Music Composer |
