Unknown (Colombian title: Mentes en Blanco) is a 2006 film directed by Colombian filmmaker Simon Brand and stars James Caviezel, Greg Kinnear, Bridget Moynahan, Joe Pantoliano and Barry Pepper about a group of men kidnapped and locked in a factory. Piecing together information around them, they realize that some were kidnapped and some were the kidnappers. They decide they must work together to figure out how to get away before the gang that captured them returns.

The film was previewed before a theater audience for the first time in New York City on December 13, 2005. It is currently unrated by the MPAA.