Paula Gallego replaced another actress just a few days before shooting began. She was well known in Spain for her role as 'María Alcántara" in the TV Series "Cuéntame" but "La Pasajera" is her feature film debut.
Feature film debut of co-director Raúl Cerezo. He was also author of the story. The original screenplay was written by Asier Guerricaechevarría and Javier Echániz but it was latter rewritten by Luis Sánchez Polack. Shot in 29 days plus two additional days of visual effects photography.
The filmmakers' approach was to use mechanical and make up and in-camera effects whenever it was possible. But the film still has more than 500 VFX shots.
The original idea came to mind after a Cerezo's carpool trip on his way to Sitges Festival.
Feature film debut for cinematographer Ignacio Aguilar.