In the 13th season of Blue Bloods, Erin Reagan, played by Bridget Moynahan, runs for Manhattan district attorney against her current boss, DA Kimberly Crawford. In the premiere, Erin feels guilty when a man Jamie arrested is released and puts him in danger. Being the police commissioner's daughter affects her race as she has to distinguish herself from the police department. Erin's decision to run for office surprises her father, Frank Reagan, and she must uncover his true motive. Her ex-husband, Jack Boyle, reappears and their chemistry resurfaces.