Boston Blue

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 jump in to help track down and arrest the killer.

Danny and Lena follow a lead in the attack on Detective Rodgers with her father's help, finding themselves in an intense standoff with a dangerous biker gang.

When a subway station shootout leaves a detective critically injured, Danny and Lena race to determine what really happened before mounting public pressure and political fallout derail the investigation.

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.