sentences:  The setting of the series was also changed from Los Angeles to New York, taking place at the fictional 125th precinct of the New York City Police Department (NYPD).The script was rewritten, with permission of the original creators, to remove the "unsatisfying" ambiguity of Sam's story in favor of a "mythological element" and "deeper mystery".The series premiered in North America on October 9, 2008, on ABC, following "Grey's Anatomy".