Tom Selleck, known for his roles in law enforcement-centered TV series, reveals that former New York City Police Commissioner Bill Bratton served as inspiration for his character on "Blue Bloods." In an interview celebrating the show's 250th episode, Selleck explains that the success of the series lies in its character-driven approach. He also discusses the meaningful salutes he receives from real law enforcement officers. Both Selleck and Bridget Moynahan express their desire for the show to continue for many seasons to come. Season 13 of "Blue Bloods" premieres on October 7th.