During the Second World War, the Allies threaten to attack Spain, an allegedly neutral country, if the Francoist regime keeps allowing Nazi Germany to extract Galician tungsten, a strategic mineral, paramount to the war effort.
Unfortunately the movie The Hidden Battle is not yet available on HBO Max.
| Writing | Paula Cons | Writer |
| Directing | Paula Cons | Director |
| Production | Carlos Amoedo | Production Manager |
| Sound | Emilio García | Sound |
| Sound | Sergio Moure de Oteyza | Original Music Composer |
| Production | Juan de Dios Serrano | Producer |
| Camera | Suso Bello | Director of Photography |
| Editing | Guillermo Represa | Editor |
