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Alfredo Mayo as El Grajo |
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Luis Peña as Mauro |
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Manuel Luna as Commander Tudela |
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Miguel Pozanco as Curro Montoya |
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Pilar Soler as Leda |
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Manuel Arbó as Ionescu |
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Rufino Inglés as Captain Romero |
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Fortunato Bernal as Rodete |
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Arturo Marín as Samuel |
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Fred Galiana as Rodríguez |
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Julio Gallego as Fidel Lozano |
| Directing | Juan de Orduña | Director |
| Camera | Alfredo Fraile | Director of Photography |
| Editing | Antonio Cánovas | Editor |
| Sound | Juan Quintero | Music |
| Art | Emilio Ferrer | Set Decoration |
| Sound | Enrique de la Riva | Sound |
| Camera | Tomás Duch | Second Assistant Camera |
| Crew | Luis Meléndez | Military Consultant |
| Crew | Marcial Torres | Military Consultant |
| Writing | Raúl Cancio | Writer |
| Writing | Luis Lucia | Writer |
| Writing | Jaime García Herranz | Writer |
