Boston Blue

1The Crash

Oct 9, 2026

When a series of murders begins mirroring the infamous Boston Strangler killings, Danny and Lena race to stop a copycat killer before he strikes again. As panic grips the city, Jonah and Sean, fresh off their rookie year, as well as Henry Reagan, jump in to help Danny and Lena track down and arrest the killer. Also, Danny faces a career-defining promotion while Lena uncovers a lead that could link the attack on Detective Rodgers to a powerful figure.

2Ripple Effect

Oct 16, 2026

As Danny and Lena follow a promising lead in the attack on Detective Rodgers with the help of her father, they find themselves in an intense standoff with a dangerous biker gang. Meanwhile, Mae faces renewed pressure from political rival Thad Longfellow, Sean and Jonah attempt to make amends after a misstep at work and Baez is confronted with an unexpected family matter.

3Fire in the Hole

Oct 23, 2026★ 5.1

When a subway station shootout leaves a detective critically injured, Danny and Lena race to determine what really happened; Sean grapples with how police work affects those closest to him.

4Everything Right Can Still Be Wrong

Oct 30, 2026

When human remains are discovered inside a great white shark, Danny and Lena find themselves hunting a killer. Meanwhile, Sarah reopens a troubling case from her past and Sean and Jonah get caught in the middle of a neighborhood feud.

5Blood Diamonds

Airs Nov 6, 2026

Jamie Reagan's visit to Boston takes an unexpected turn when he and Danny are drawn into a diamond heist linked to a violent family feud, forcing the brothers to confront lingering tensions of their own. Meanwhile, Mae faces a difficult case after swatting results in a man's death, Lena investigates a series of suspicious deaths linked to one of Reverend Peters' parishioners and Sarah and Seth encounter an unexpected hurdle while planning their wedding.

6Bloodlines

Airs Nov 13, 2026

When Boston P.D. discovers a baby abandoned in a food delivery robot, Danny's anger causes him to slip back into his old rule-breaking ways. Also, Sarah faces a difficult decision when her estranged mother, Gwen (Marg Helgenberger), reenters her life, and Sean and Jonah search for a fellow officer who went AWOL.