In season 13 of BLUE BLOODS, the job takes a dangerous turn for the Reagans when Eddie and Jamie deal with a domestic violence case associated with an investigation led by Danny and Baez. Also, Frank and his friend, Archbishop Kearns (Stacy Keach), go on a mission to avail themselves to an unfiltered look at the city; and Erin is presented with a surprising offer by her ex-husband, Jack Boyle (Peter Hermann), regarding her run for District Attorney.