The eighth season of Blue Bloods, a police procedural drama series created by Robin Green and Mitchell Burgess, premiered on CBS September 29, 2017.

Erin pleads with Danny, who has been contemplating retirement since Linda's death in a rescue helicopter crash, to help her with a case involving her ex-husband, Jack (Peter Hermann) who's been attacked in his office.

Meanwhile, Jamie and Eddie go undercover as a couple to bust a shady drug dealer after they respond to a call regarding multiple overdoses at a club.

One of the Prospect Park Six, Duwann Wilson, is revealed to have hired a hitman, Dante Sorrento, to kill various family members of the arresting officers and prosecutors responsible for locking them up nine years ago (one of which is Erin's boss, Monica Graham played by Tamara Tunie), as his mother had died while he was in prison and he wasn't allowed to attend her funeral.

This affects their personal relationship; at Sunday dinner, Jamie reveals he looked at the patrol guide and didn't find any rules against married cops being partners on the force and brings Eddie, now his fiancée, to officially meet the family.