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Fernando Sancho as Ulop |
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Pedro Díez del Corral as Peter |
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Pat Johnson as Helen |
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William Layton as Dean |
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Jaime Casals as Patient |
| Directing | Francisco Macián | Director |
| Costume & Make-Up | Carmen Menchala | Makeup Artist |
| Editing | Ramón Quadreny | Editor |
| Production | Jaime Fuentes | Unit Manager |
| Camera | Luis Cuadrado | Director of Photography |
| Writing | Francisco Macián | Screenplay |
| Sound | Stelvio Cipriani | Original Music Composer |
| Directing | María Teresa Font | Script Supervisor |
| Art | Enrique Garriga | Production Design |
| Crew | Gilberto Soriano | Special Effects |
