Tom Selleck (Las Vegas, Jesse Stone, Magnum P.I.) is Frank Reagan, chief of police, worried dad and caught between living up to and dealing with the Reagan legacy.Donnie Wahlberg (Boomtown, Band of Brothers) is Danny Reagan, Iraqi war vet and hot-headed detective who resorts to justice that is occasionally outside of the law.Bridget Moynahan (Sex and the City, Eli Stone, Ramona and Beezus) is Erin Reagan-Boyle, assistant DA and newly single mom. Lone female Reagan. Moral compass.Will Estes (Eleventh Hour, Reunion) is Jamie Reagan, who decided not to follow Erin into law, despite the law degree. He's a new beat cop. And he's got a choice to make.Len Cariou (Damages, Law & Order, Brotherhood) is Henry Reagan, very stern patriarch and former...