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José Casas as S |
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Tania Serrano as Mary |
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Antonio Mayans as Dr. Vólkov |
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Diana Lucena as Virgina |
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Alba Ferrara as Isabel |
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Miguel Ángel Romero as Creature |
| Crew | Felix Iniesta | Script |
| Writing | Veronica Cervilla | Writer |
| Art | Jusepe Cruz | Graphic Designer |
| Sound | Norberto Ramos del Val | Music |
| Crew | Ana Ramirez | Production Controller |
| Production | Rocío García Pérez | Producer |
| Production | Alberto Martínez Ufo | Producer |
| Production | Veronica Cervilla | Producer's Assistant |
| Sound | Manuel Ruiz | Sound Editor |
| Production | Tania Serrano | Producer's Assistant |
| Directing | Juan José Patón | Director |
| Sound | Ana Cano | Sound Mixer |
| Costume & Make-Up | Flor Florale | Costume Designer |
| Camera | Jusepe Cruz | Camera Technician |
| Art | Alberto Martínez Ufo | Production Design |
| Camera | Jesús Montalban | Camera Operator |
| Writing | Veronica Cervilla | Screenstory |
| Crew | Ana Cobo | Script |
| Costume & Make-Up | Fran Castro | Makeup Artist |
| Camera | Álvaro Arias | Camera Technician |
| Camera | Rocío García Pérez | Director of Photography |
