A major scientific breakthrough traps ingenious experimenter Alfonso between two parallel worlds. Is the grass greener on the other side?
| Directing | Nacho Vigalondo | Director |
| Writing | Nacho Vigalondo | Writer |
| Production | Nahikari Ipiña | Producer |
| Production | Christopher White | Co-Producer |
| Production | Christopher White | Executive Producer |
| Sound | Anntona | Music |
| Crew | Jon D. Domínguez | Cinematography |
| Editing | Victor Berlin | Editor |
| Production | Arantza Vélez | Casting |
| Art | Noe Cabañas | Art Direction |
| Costume & Make-Up | Beatriz García | Costume Design |
| Costume & Make-Up | Óscar del Monte | Special Effects Makeup Artist |
| Costume & Make-Up | Nacho Díaz | Special Effects Makeup Artist |
| Costume & Make-Up | Ana Belén Fernández Román | Key Hair Stylist |
| Costume & Make-Up | Ana Belén Fernández Román | Key Makeup Artist |
| Costume & Make-Up | Cristina Malillos | Assistant Hairstylist |
| Costume & Make-Up | Cristina Malillos | Assistant Makeup Artist |
| Production | Manuel Sánchez | Production Manager |
| Directing | Isidro Carbajal | First Assistant Director |
| Directing | Sofía Merlín | Second Assistant Director |
| Art | Arturo Artal | Assistant Art Director |
| Art | Miguel Junquera | Assistant Art Director |
| Art | Rafael Sanz | Assistant Art Director |
| Sound | Sergio Fernández Borrás | Sound Designer |
| Sound | Sergio López-Eraña | Boom Operator |
| Sound | Sergio López-Eraña | Production Sound Mixer |
| Visual Effects | Jorge Torrens | Visual Effects |
| Crew | Nabuco Donosor | Stunt Double |
| Camera | Victor Berlin | Digital Imaging Technician |
| Camera | Luis Fuentes | Focus Puller |
| Lighting | Manuel Gago | Electrician |
| Camera | Debora M. Geanini | First Assistant Camera |
| Lighting | Raúl Pérez Palomo | Gaffer |
| Crew | Alberto Rivas | Video Assist Operator |
| Camera | Victor Berlin | Data Wrangler |
| Editing | Jon D. Domínguez | Online Editor |
| Production | Sofía Merlín | Location Manager |
| Directing | Julia Guillén Creagh | Script Supervisor |
| Production | Sara E. García | Production Assistant |
| Production | Clara Gómez Aragón | Production Assistant |
| Crew | Ruth Martín | Set Production Assistant |
| Camera | Mario Martín | Still Photographer |