"Blue Bloods" is a drama about a multi-generational family of cops dedicated to New York City law enforcement. Frank Reagan (Tom Selleck) is the New York Police Commissioner, and he heads both the police force and the Reagan brood. He runs his department as diplomatically as he runs his family, even when dealing with the politics that plagued his unapologetically bold father Henry during his stint as chief. As the Police Commissioner, Frank must balance his duties of running the largest police force in the world and being his kids' boss. Watch the iconic actor take the BUILD stage to speak on the series.