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Emilio Tuero as Roberto |
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Rosita Fornés as Olga |
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Josefina Romagnoli as Marta |
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Jorge Mondragón as Doctor |
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Natalia Ortiz as Mamá de Roberto |
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Agustín Sen as Don Aurelio (padre de Roberto) |
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José Goula as Padre de Marta y Olga |
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Aurora Walker as Josefina (madre de Marta y Olga) |
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Manuel Noriega as Doctor (uncredited) |
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Aurora Ruiz as Criada (uncredited) |
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David Valle González as Empleado de Roberto (uncredited) |
| Directing | Chano Urueta | Director |
| Writing | Hermann Sudermann | Novel |
| Writing | Chano Urueta | Adaptation |
| Writing | Chano Urueta | Screenplay |
| Production | Vicente Saisó Piquer | Producer |
| Sound | Jorge Pérez | Original Music Composer |
| Camera | Agustín Jiménez | Director of Photography |
| Editing | Alfredo Rosas Priego | Editor |
| Art | Manuel Fontanals | Production Design |
| Art | Pablo Galván | Set Decoration |
| Costume & Make-Up | Sara Herrera | Makeup Artist |
| Costume & Make-Up | Agripina Lozada | Hairstylist |
| Directing | Enrique Cahero | Assistant Director |
| Sound | Nicolás de la Rosa | Sound Recordist |
| Sound | Howard E. Randall | Sound Director |
| Lighting | Carlos Nájera | Lighting Technician |
| Camera | Enrique Wallace | Camera Operator |
| Sound | Manuel Esperón | Sound Recordist |
| Sound | Jorge Pérez | Conductor |
