
In Boston Blue, NYPD Detective Danny Reagan takes a position with Boston PD. Once in Boston, he is paired with Detective Lena Peters, the eldest daughter of a prominent law enforcement family.

NYPD detective Danny Reagan teams up with Boston detective Lena Silver to investigate a deadly fire at a tech company; as they dig deeper, they uncover a complex web of secrets involving facial recognition technology.

Lena and Danny are pulled into a high-stakes murder investigation when a whistleblower tied to one of Mae's court cases is found dead; Jonah and Sean prepare for their first official day on the job.

A body found on the Boston wharf pulls Lena and Danny into a tense drug investigation; Jonah and Sean chase down a missing man tied to a scavenger hunt; Sarah and Mae navigate emotional challenges at home and in court.

The Silver family observes Yahrzeit to honor patriarch Ben Silver on the one-year anniversary of his death; Lena and Danny investigate the murder of a beloved shop owner; Sarah responds to a hostage crisis; Mae faces a difficult legal decision.

Danny and Lena take on a high-stakes murder case that leads to one of Boston's most infamous unsolved crimes; tensions rise within the Silver family as a complex shooting case sparks debate over accountability and parenting.

With an assist from NYPD's Maria Baez, Danny and Lena hunt down a serial home invader; Sean's budding romance faces unexpected complications; Mae and Sarah uncover a troubling leak that could upend the justice system.

Lena's pursuit of justice forces Danny into an unexpected role reversal; Sarah faces a personal dilemma that tests her resolve; Mae contends with political pressure; Sean and Jonah uncover more than they anticipated during a routine case.
Danny and Lena's investigation into a robbery gone wrong quickly turns personal; Sean and Jonah face rising tensions with Boston's firefighters; Sarah clashes with boyfriend Seth over family discipline.
Mae faces public and family backlash over the consequences of her past decisions; Sarah struggles with guilt that pushes her to take risks in pursuit of justice; Lena and Danny dive into a tense homicide case.
Complete episode guide for Boston Blue with detailed information about every season and episode including air dates, summaries, ratings, and streaming availability in United States.
This episode guide is organized by seasons, making it easy to track your viewing progress or find specific episodes. Use the episode information to plan your binge-watching sessions or catch up on missed episodes.