Danny Reagan is the main protagonist of Blue Bloods. Danny is one of the third generations of Reagan family in public service. His grandfather Henry was a retired Police Commissioner, his father Frank is the current police commissioner, his brother Joe was a cop and detective in Warrants Squad, his younger and little brother Jamie is a beat cop and his sister Erin is an assistant district attorney in the Reagan family business. Danny was a kid he wore a fire fighter uniform, but his grandfather sent him straight and told him no Reagan would ever work as a fireman in a million years. So, he switched on a police uniform as a costume and never took it off. Danny lives in Staten Island with his wife Linda who he married in 1996 and has two boys Jack (2001) and Sean (2004). He worked with the N