In the upcoming season 13 of Blue Bloods, Erin Reagan, played by Bridget Moynahan, will be running for Manhattan district attorney against her boss, DA Kimberly Crawford. As the daughter of the police commissioner, Erin must establish herself as independent from her father's influence. In the premiere, a case hits close to home, leading Erin to question her office's policies. Meanwhile, her ex-husband Jack Boyle returns and offers political and financial support, but their chemistry is complicated by Erin's campaign. The new season promises to bring in additional characters and conflicts as Erin navigates the world of politics.