|Director:||Álex de la Iglesia|
|Writer:||Jorge Guerricaechevarría, Álex de la Iglesia|
|IMDb Rating:||7.0 (1,965 votes)|
Juan with his wife Sonia and their daughter move into their new house and slowly begin to discover that they might not be alone. They hear voices over the baby monitor, and Juan begins to become more and more obsessed with the idea that they aren't alone in the house. He buys a video monitor so they can keep an eye on their baby, and one night he sees a figure on the screen, looking over their child's cot.