Los desafíos presents three separate stories that are linked by an American presence in Spain in the 1960s, with Dean Selmier playing the role of the American male in all three.
| Directing | José Luis Egea | Director |
| Directing | Víctor Erice | Director |
| Directing | Claudio Guerín Hill | Director |
| Writing | José Luis Egea | Writer |
| Writing | Rafael Azcona | Writer |
| Writing | Víctor Erice | Writer |
| Writing | Claudio Guerín Hill | Writer |
| Production | Elías Querejeta | Producer |
| Crew | Luis Cuadrado | Cinematography |
| Editing | Pablo G. del Amo | Editor |
| Art | Pablo Gago | Set Decoration |
| Costume & Make-Up | María Carmen Alberdi | Assistant Makeup Artist |
| Costume & Make-Up | Cristóbal Criado | Makeup Artist |
| Production | Primitivo Álvaro | Production Manager |
| Directing | Francisco J. Querejeta | Second Assistant Director |
| Directing | José Luis Ruiz Marcos | Assistant Director |
| Art | Salvador Augustín | Assistant Set Decoration |
| Art | Pablo Martínez Bris | Property Master |
| Art | Jesús Mateos | Props |
| Camera | Teo Escamilla | Camera Operator |
| Camera | Laureano López | Still Photographer |
| Costume & Make-Up | Angelines Castro | Seamstress |
| Editing | Rosario Sáinz de Rozas | Assistant Editor |
| Directing | José Miguel Hernán | Script Supervisor |
