Blue Bloods is a popular CBS crime drama that premiered in September 2010. The show follows the Reagan family, a family of cops from New York City. In season 13, Len Cariou plays the retired police commissioner Henry Reagan, while Tom Selleck plays his son Frank, the current PC. Donnie Wahlberg plays Frank's son Danny, who is a detective, and Will Estes plays Frank's younger son Jamie, who is a sergeant. Bridget Moynahan plays Erin, Frank's daughter, who is an assistant district attorney. Her daughter Nicky, played by Sami Gayle, is also a part of the show.