A political prisoner in a South American dictatorship escapes and is pursued throughout the country by a bloodthirsty dog.
| Directing | Antonio Isasi-Isasmendi | Director |
| Writing | Antonio Isasi-Isasmendi | Screenplay |
| Writing | Alberto Vázquez Figueroa | Novel |
| Writing | Juan Antonio Porto | Screenplay |
| Production | Enrique Gutiérrez | Producer |
| Production | Rafael Pérez Mensaque | Associate Producer |
| Sound | Antón García Abril | Music |
| Camera | Juan Gelpí | Director of Photography |
| Editing | Carmen Frías | Editor |
| Art | José Antonio de la Guerra | Art Direction |
| Costume & Make-Up | Elisa García | Costume Design |
| Costume & Make-Up | Lola Salvador | Costume Design |
| Costume & Make-Up | Haydeé Ascanio | Makeup Artist |
| Costume & Make-Up | Mercedes Ballón | Hairstylist |
| Costume & Make-Up | María de Elena | Makeup Artist |
| Costume & Make-Up | Fernando Florido | Makeup Artist |
| Costume & Make-Up | Dolores García Rey | Assistant Makeup Artist |
| Costume & Make-Up | Janett Lira | Assistant Makeup Artist |
| Production | Ricardo Bonilla | Production Manager |
| Production | Jorge Gherrardy | Unit Production Manager |
| Directing | Antonio Astray | Third Assistant Director |
| Directing | Antonio Isasi Jr. | Second Assistant Director |
| Directing | José María Ochoa | Assistant Director |
| Art | Juan de la Flor | Property Master |
| Sound | Jacinto Cora | Sound Engineer |
| Sound | Julián García | Sound |
| Sound | José Nogueira | Sound |
| Sound | Miguel Ángel Polo | Sound |
| Sound | Rafael Rosales | Sound |
| Crew | Manuel Archilla | Special Effects |
| Crew | Rafael de la Rosa | Stunt Coordinator |
| Camera | Francisco Beringola | Assistant Camera |
| Camera | Juan Cobo | Second Assistant Camera |
| Camera | Octavio Fernández-Roces | Still Photographer |
| Camera | José Funes | Key Grip |
| Lighting | Raúl López | Electrician |
| Lighting | Gregorio Marqués | Gaffer |
| Lighting | Alirio Rojas | Gaffer |
| Camera | Hipólito Rojas | Assistant Camera |
| Camera | Ramón Sempere | Camera Operator |
| Camera | Otto Sieberg | Camera Operator |
| Camera | Antonio Isasi-Isasmendi | Camera Operator |
| Costume & Make-Up | Mariano | Tailor |
| Costume & Make-Up | Ilga Penezis | Seamstress |
| Editing | Raúl González Bornez | Assistant Editor |
| Editing | José María Riaza | Assistant Editor |
| Production | Ken Korrall | Location Manager |
| Directing | Rosa Biadiu | Script Supervisor |
| Production | José Leandro Delgado | Production Assistant |
| Production | Esteban Gutiérrez | Production Assistant |
| Production | Rafael Minaya | Production Assistant |
| Production | Vicente Terán | Production Assistant |
| Crew | Antonio Bueno | Special Effects |