The troubled story of the Churruca family, a noble lineage of brave seamen, descendants of Cosme Damián Churruca, the Spanish hero of the Battle of Trafalgar; from the Spanish-American War (1898) to the end of the Spanish Civil War (1936-39). (In 1950, a new cut of the film was released with less ideological depth and ten minutes shorter.)
| Directing | José Luis Sáenz de Heredia | Director |
| Writing | Francisco Franco | Novel |
| Writing | José Luis Sáenz de Heredia | Screenplay |
| Writing | Antonio Román | Screenplay |
| Editing | Eduardo García Maroto | Editor |
| Editing | Bienvenida Sanz | Editor |
| Art | Sigfrido Burman | Production Design |
| Camera | Cecilio Paniagua | Camera Operator |
| Camera | Heinrich Gärtner | Camera Operator |
| Camera | José F. Aguayo | Director of Photography |
| Sound | Manuel Parada | Original Music Composer |
| Directing | Jerónimo Mihura | Assistant Director |
| Directing | Manuel Rosellón | Assistant Director |
| Costume & Make-Up | Margarita Tapper | Makeup Artist |
| Costume & Make-Up | José Arguelles | Makeup Artist |
| Costume & Make-Up | José Echevarría | Makeup Artist |
| Costume & Make-Up | Francisco Puyol | Hairstylist |
| Costume & Make-Up | Fernanda Alonso | Hairstylist |
| Costume & Make-Up | Manuel Comba | Costume Designer |
| Sound | Pierre Certes | Sound Engineer |
| Sound | J. Flierbaum García | Sound Recordist |
| Writing | Francisco Franco | Screenstory |
| Art | Luis M. Feduchi | Production Design |
| Sound | León Lucas de la Peña | Sound Engineer |
| Production | Luis Dias Amado | Production Director |
| Writing | José Luis Sáenz de Heredia | Dialogue |
