Matt Smith may have completed his role as the doctor in Doctor Who, but he's not going to be out of the limelight for long. The BBC reports that Smith will be playing Patrick Bateman the musical version of Bret Easton Ellis' American Psycho, opening in London at the end of the year. The role, originally played by Christian Bale in the 2000 movie adaptation, tells the story of an investment banker who slowly loses touch with reality and falls into a murdering rampage.