US 
Canada 
Mexico 
Spain 
UK 
Ireland 
Australia 
Argentina 
Chile 
Colombia 
Uruguay 
Paraguay 
Peru 
Ecuador 
Venezuela 
Costa Rica 
Honduras 
Guatemala 
Bolivia 
Dominican Rep. Unknown
8,375
Horror. Thriller. Mystery
Unknown unfolds in the style of "Memento," a story told in reverse with an unforeseeable ending. Five men wake up trapped in a chemical warehouse with no memory of who they are or how they got there. They are forced to try to figure out who is good and evil before it's too late.
