BTS
- Godina: 1970
- Country: Spain
- Žanr: Thriller, Mystery
- Studio:
- Ključna riječ: behind the scenes, series of murders, locked door, arts school, school project, murder in school, locked inside
- Direktor: Igor Morales
- Uloge: Néstor Seller, Juan Paya, Lucía Agustín, Irene Hickey, Candela del Olmo, Álvaro Galarza Lima
