Directed by
| Servando González | ||
| Ángel Rodríguez | ... | (co director) |
Writing Credits (in alphabetical order)
| Julio Alejandro | ... | (adaptation) |
| José María Fernández Unsáin | ... | (story) |
| Luis Llorente | ... | (adaptation) |
| Alfredo Ruanova | ... | (story) (adaptation) |
Cast (in credits order)
| Libertad Lamarque | ... | Alegría Román | |
 |
Carlos Lico | ... | Mario |
| Julián Bravo | ... | Toño (as Juliancito Bravo Mora) | |
| Adriana Roel | ... | Rosalva | |
| Claudia Islas | ... | Kitty (amante de Mario) | |
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Luis G. Roldán | ... | Luis G. Roldan |
| Delia Magaña | ... | Sofía | |
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Enrique Pontón | ... | Alfonso (productor) |
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Carlos Cardán | ... | Lic. Ramos |
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Sergio Núñez Falcón | ... | Secuestrador |
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Carlos Martínez | ... | (as Carlos Martínez 'Macaco') |
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Sergio Golarte | ||
| Yolanda Ciani | ... | Carmelita | |
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Agustín Fernández | ... | Hombre golpea Mario |
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Los Dominics | ... | Grupo musical |
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Carlos Reyes | ||
| Rest of cast listed alphabetically: | |||
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Carlos Bravo y Fernández | ... | Jugador de cartas (uncredited) |
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José Luis Fernández | ... | Hombre golpea Mario (uncredited) |
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Bertha Lehar | ... | Fan de Alegria (uncredited) |
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Jesús Magaldi | ... | Esbirro secuestrador (uncredited) |
Produced by
| Alfredo Malerba | ... | producer |
| Gregorio Walerstein | ... | producer |
Music by
| Enrico C. Cabiati | ||
Cinematography by
| Fernando Colín | ||
Editing by
| Sergio Soto | ||
Production Design by
| José Méndez | ||
Makeup Department
| María Eugenia Luna | ... | makeup artist |
| Aida Sánchez | ... | hair stylist (as Aida Sánchez Ávila) |
Production Management
| Antonio H. Rodríguez | ... | production manager |
Second Unit Director or Assistant Director
| Armando Castillón | ... | assistant director |
| Ángel Rodríguez | ... | assistant director |
Sound Department
| Francisco Guerrero | ... | sound recordist |
| Heinrich Henkel | ... | re-recording mixer |
| Víctor Rojo | ... | sound |
| Ricardo Saldívar | ... | sound assistant |
Special Effects by
| Juan Muñoz Ravelo | ... | special effects |
Camera and Electrical Department
| Xavier Cruz | ... | camera operator (as Javier Cruz) |
Editorial Department
| Lilia Lupercio | ... | negative cutter |
Additional Crew
| Nicolás Rueda hijo | ... | title |
