"Cell 211" is a Spanish thriller film directed by Daniel Monzón, released in 2009. The story follows a rookie prison officer, Juan Oliver, who gets trapped in a violent riot while inspecting a high-security prison. To survive, he pretends to be an inmate, navigating the dangerous dynamics among the prisoners and guards. The film explores themes of power, survival, and morality within the prison system. It features a strong performance by Luis Tosar as the charismatic inmate Malamadre, who becomes a central figure in the unfolding chaos. "Cell 211" received critical acclaim and won several awards, including Goya Awards.