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.
Unfortunately the movie The Challenges is not yet available on HBO Max.
| Directing | Víctor Erice | Director |
| Directing | José Luis Egea | Director |
| Directing | Claudio Guerín Hill | Director |
| Art | Pablo Gago | Set Decoration |
| Editing | Pablo G. del Amo | Editor |
| Production | Primitivo Álvaro | Production Manager |
| Costume & Make-Up | María Carmen Alberdi | Assistant Makeup Artist |
| Crew | Luis Cuadrado | Cinematography |
| Costume & Make-Up | Cristóbal Criado | Makeup Artist |
| Directing | José Miguel Hernán | Script Supervisor |
| Directing | José Luis Ruiz Marcos | Assistant Director |
| Art | Jesús Mateos | Props |
| Costume & Make-Up | Angelines Castro | Seamstress |
| Art | Pablo Martínez Bris | Property Master |
| Camera | Teo Escamilla | Camera Operator |
| Camera | Laureano López | Still Photographer |
| Directing | Francisco J. Querejeta | Second Assistant Director |
| Art | Salvador Augustín | Assistant Set Decoration |
| Editing | Rosario Sáinz de Rozas | Assistant Editor |
| Camera | Ángel González | Assistant Camera |
| Writing | Rafael Azcona | Writer |
| Writing | Claudio Guerín Hill | Writer |
| Writing | Víctor Erice | Writer |
| Writing | José Luis Egea | Writer |
| Production | Elías Querejeta | Producer |
