- Country: Spain
- Genres: Documentary, Short
- Release: 2012-03-20
- Director: Martin Samper
- Writers: Martin Samper
- Language: Spanish
- Stars: Luis Tosar , Jaume Balagueró , Alberto Marini , Marta Etura
- Runtime: 13 min
- Awards: N/A
- AKA: Mientras duermes: Making of , Mientras duermes: Making of (Spain)
- Plot: N/A
- IMDB:tt4454612