BTS
- Ano: 1970
- País: Spain
- Xénero: Thriller, Mystery
- Estudo:
- Palabra clave: behind the scenes, series of murders, locked door, arts school, school project, murder in school, locked inside
- Director: Igor Morales
- Reparto: Néstor Seller, Juan Paya, Lucía Agustín, Irene Hickey, Candela del Olmo, Álvaro Galarza Lima
