Blue Bloods returns with Season 13, where Erin is running for the position of Manhattan DA. The premiere episode sees Frank going on a late-night walk to assess the morale of the NYPD. He realizes the loss of morale and plans to address it directly. The show aims to remain nonpartisan, presenting both sides of the law enforcement family's point of view. Frank grapples with whether to endorse Erin for DA, causing tension within the family. Sunday dinner will feature surprising guests, and Jack Boyle, Erin's ex-husband, has been lurking. The cast is hopeful for a 15th season.