Frank Reagan is the head of the New York Police Department and the patriarch of the Reagan family, which he manages as diplomatically as he manages the police, even when dealing with politics, something that annoyed his overly bold father, Henry, when he was the police commissioner. Frank's source of pride and concern is his eldest son, Danny, an experienced detective, a family man, and a veteran of the war in Iraq, who sometimes resorts to questionable methods to solve cases.