There are way to many holes is this movie. You want me to believe that there is a entire underground Society of people that don’t speak and only live a shot escalator ride below every one else? The amount of space required to have a doppelgänger of every human in the world is astronomical which also makes this super unbelievable. How in hell would these people be able to go undetected for so long being so close? I would love to know what happens when a person moves cross country, how do they move the doppelgänger? For that matter what about a different country across the world do they somehow tunnel? In addition the plot twist is super obvious and easy to detect very early in the movie. Sorry this movie missed the mark and was not even scary.