Ian Quinlan

The job takes a dangerous turn for the Reagans when Eddie and Jamie deal with a domestic violence case, on the season premiere.

Anthony's daughter is the sole eyewitness to a fatal shooting; Frank wants to punish an off-duty cop for inaction during an armed robbery.

Reagan family tensions run high when Frank and his grandson, Joe Hill, contend with an insult to the memory of Joe's father, Joe Reagan.

Danny and Baez investigate an attack that leaves a friend hospitalized. Jamie begs Erin to release a perp who can lead him to a criminal.

Frank contends with a potentially dirty cop within his ranks; Eddie and Badillo track down the culprits behind the theft of a bookstore.

Danny crosses paths with Sonny Le, a criminal from a previous case, when he investigates a gang attack with a shocking motive.