Blue Bloods is an American police procedural drama television series that airs on CBS. Its main characters are members of the fictional Reagan family, an Irish Catholic family in New York City with a history of work in law enforcement. Blue Bloods stars Tom Selleck as New York City Police Commissioner Frank Reagan; other main cast members include Donnie Wahlberg, Bridget Moynahan, Will Estes, Len Cariou, and Sami Gayle. The show is filmed on location in New York City with occasional references to nearby suburbs. The series debuted on September 24, 2010, with episodes airing on Fridays following CSI: NY before being moved to Wednesdays at 10:00 p.m. Eastern and Pacific time and 9:00 p.m. Central and Mountain time for a four-week tryout. After four weeks, it returned to its original Friday 10:00 p.m. Eastern time slot, where it has remained since. On April 12, 2019, CBS renewed the series for a tenth season; it premiered on September 27, 2019.