The Reagan family on "Blue Bloods" consists of patriarch Henry, son Frank, and grandchildren Danny, Erin, Joe, and Jamie. Daniel is a detective with two sons, while Erin is the Bureau Chief of the Trial Bureau. Joe died in the line of duty and had one biological son, Joseph Hill. Jamie is a Sergeant who is married to Eddie Janko-Reagan, a fellow police officer. Linda was Daniel's wife and mother to their two sons before she died in a helicopter crash. Nicky is Erin's daughter and wants to become the first female police officer in the Reagan family. Jack and Sean are Daniel's sons, with Sean being the youngest of the Reagan grandchildren. Joe Hill is the biological son of the late Joe Reagan and a Detective in the NYPD.