Ryuhei Kitamura
The film's original director, Patrick Tatopoulos, originally planned to shoot the film in 2005 in New York City and Montreal. Tatopoulos left the production in 2006 and was replaced by Ryuhei Kitamura. Shooting was moved to Los Angeles, due to the prohibitive cost of shooting in New York City. Various locations, including the L.A. Metro subway system, were used instead. Shooting began March 18, 2007.