Het is 1973 als Txema, een Baskische aannemer, tegen zijn wil door de ETA wordt betrokken bij een moordaanslag. Als hij wordt opgepakt is de SECED, de Spaanse geheime dienst, in hem geïnteresseerd vanwege zijn connecties bij de ETA. Ze zetten hem in als infiltrant en hij weet door te dringen tot de top van de ETA. Zo maken wij kennis met de werkwijze van zowel de SECED als de ETA, waar interne conflicten op een bloedige manier worden opgelost. Gaandeweg wordt het de hoofdpersoon duidelijk dat persoonlijke belangen vaak zwaarder wegen dan politieke idealen en dat niet iedereen gebaat is bij de ontmanteling van de ETA.
Nee, helaas is El Lobo nog niet beschikbaar op Netflix in Nederland.
| Writing | Antonio Onetti | Writer |
| Directing | Miguel Courtois | Director |
| Production | Miguel Torrente | Line Producer |
| Production | Julio Fernández | Executive Producer |
| Production | Melchor Miralles | Executive Producer |
| Crew | Néstor Calvo | Cinematography |
| Art | Koldo Vallés | Art Direction |
| Crew | Diego Herberg | Stunts |
| Production | Julia Calurano | Publicist |
| Art | Leopoldo Báez | Construction Coordinator |
| Costume & Make-Up | Victoria Velázquez | Costume Design |
| Crew | Reyes Abades | Special Effects Coordinator |
| Crew | Javier Navasques | Video Assist Operator |
| Lighting | Roberto Cuadrado | Electrician |
| Sound | Ricardo Viñas | Dolby Consultant |
| Production | Roberto Padilla | Unit Manager |
| Editing | Antonio Álvarez | Color Timer |
| Sound | Francesc Gener | Original Music Composer |
| Production | Antonio Onetti | Casting |
| Production | Américo Piñeiro | Casting |
| Sound | Tomás Erice | Boom Operator |
| Visual Effects | Jesús Pascual | Visual Effects Supervisor |
| Crew | Leandro Muslera | Property Master |
| Production | Teresa Gefaell | Production Manager |
| Art | Miguel Ángel Gómez | Painter |
| Costume & Make-Up | José Antonio Sánchez | Makeup Artist |
| Camera | Fernando Sancho | Still Photographer |
| Costume & Make-Up | Paquita Núñez | Hairstylist |
| Costume & Make-Up | Pedro Moreno | Costume Design |
| Crew | Iván Marín | Sound Recordist |
| Crew | Ignacio Carreño | Stunt Coordinator |
| Crew | Jesús L. Pérez Villar | Post Production Supervisor |
| Sound | James Muñoz | Sound Editor |
| Camera | José Ramón Delgado | First Assistant Camera |
| Directing | Elena Gil Nagel | Script Supervisor |
| Camera | Olivier Gallois | Camera Operator |
| Sound | Manuel Cora | Sound Mixer |
| Crew | Manuel Casla | Carpenter |
| Editing | Guillermo S. Maldonado | Editor |
| Lighting | Arcadio Sequeira | Gaffer |
| Production | Sara Ramírez | Production Coordinator |
| Directing | Yan Angosse | Second Assistant Director |
| Directing | Carmen Torres | Third Assistant Director |
| Sound | Manuel Carrión | Sound Effects |
| Editing | Esperanza González | Negative Cutter |
| Directing | Manuel L. Cañizares | First Assistant Director |
| Writing | Alberto Marini | Story Editor |
| Camera | Ángel Gómez Martín | Key Grip |
| Camera | Enrique Bello | Grip |
| Costume & Make-Up | Dolores Plaza | Costumer |
| Editing | José Manuel Jiménez | Assistant Editor |
| Production | Xavier Camprecios | Additional Production Assistant |
| Production | Paco Elías | Assistant Accountant |
| Directing | Jesús Liedo | Second Assistant Director |
| Sound | Joan Cayuela | Music Producer |
| Production | Antonio Mendoza | Accountant |
| Production | Gonzalo Cañellas | Production Assistant |
| Camera | Gontzal Domingo | Additional First Assistant Camera |
| Sound | Jaime Climent | Sound Assistant |
| Production | Nicolás Lecocq | Controller |
| Art | Puri Adorna | Assistant Decorator |
| Costume & Make-Up | Cecilia Escot Mangas | Assistant Makeup Artist |
| Sound | Manuel Carrión | Foley Artist |
| Camera | Juan Aragonés | Assistant Camera |
| Crew | José Ramón Astaburuga | Dialect Coach |
