National Marine Fisheries Service agent Jackie Quiñones has a wrench thrown in her life when she uncovers a dead body on the beach, plunging her into an opioid ring investigation.

After discovering a lead on Sherry's murder, Jackie becomes determined to solve the case.Junior finds himself trapped, and Ray connects with his CI in ways that are unprofessional.

Jackie returns to rehab to help her investigation. Ray starts closing in on Osito at the same time he and Renee cross the line. Junior takes the first step to becoming a soldier.

Jackie finds out where Krista Collins is staying, but gets pulled back into her own life. Ray comes face to face with Osito. Junior tries to reconcile with Donna's family.

Jackie goes on a bender, threatening everything she's got going for her, throwing her sobriety out the window, and ultimately putting Krista Collins in danger like never before. Junior has to prove himself in a new way. Ray and Renee go on a date.

Jackie abandons her stakeout for a firey confrontation. Ray is once again humilitated, and does what he can to get back on the force.

Jackie and Junior struggle to cope in the wake of a traumatic event. Ray's investigation picks up speed. Ray is there for Renee when she really needs him.

Jackie is white-hot to prove herself as a cop and avenge the death of her best friend, Junior. Frankie teams up with his cousin while Rays off the force because of Renee. Theres a new deadly drug in town, Great White.

Jackie and Leslie get deeper into the case, and with each other. Someone will make a decision they will regret.

It's the day before Thanksgiving on the Cape: things are looking up for Ray, and looking grim for Jackie. Frankie is filled with anxiety over his business with Jorge.

It’s Thanksgiving but the drugs and despair don’t let up. Frankie, riding an ocean of anxiety, takes Renee to the point of no return. Ray is going all in on a case no one wants him on, and Alan’s holiday dinner is interrupted.

State cop Jackie Quiñones is back to her wild partying ways, Ray Abruzzi is top cop after taking down the New York connection, and imprisoned Frankie Cuevas secures a new partner on the outside.

Jackie’s new partner Leslie matches her ambition perfectly as their relationship deepens on and off the force. Frankie and Jorge continue to move forward but Charmaine, their New York connection, is a wild card. Jorge sows distrust between Frankie and Renee as Alan turns to Frankie’s old right-hand man, Ostio, to solve a case.

Ray is so close to getting everything he’s wanted, but he will have to maneuver things just right. Jackie’s met with a crossroad and must choose how to move forward.

The whole “Great White” operation is cracked open, but a few mysteries remain. Ray’s plan to get his job back has a complicated ending. Jackie goes from feeling like a hero after an important discovery to the zero who let something critical get away.

Jackie fails a pee test and she is off the force - and it wasn’t even her pee! Renee unwittingly lets Frankie back into her life and Osito defends his turf.

Jackie and Ray try to return to business as usual after a depressing failure, only to learn the case might not actually be closed.

Tempers boil over and Ray and Alan explode at each other. Frankie learns valuable intel about Osito and Jackie learns there are even more missing or murdered prostitutes.

When Jackie realizes Junior's involved with Sherry Henry's murder, she enlists Ray and the entire CCINU to track him down -- before Frankie has him murdered. Renee finds herself deeply questioning her budding relationship with Ray.

Ray and Renee are backed against the wall and must make a deal with the devil. Shane’s all-business approach brings sworn enemies together and a chance meeting helps Jackie pick a side in the coming battle.

Renee risks everything to change her world around. Alan sets a trap that covers the entire Cape.

Shane has a new partner. Frankie has intel for Alan on Jorge’s murder. Ray and Renee’s relationship hits rock bottom and Jackie completes rehab - no more rogue hero bullshit.

Jackie lays out her missing prostitute’s case and gets Alan’s cooperation to go after Swayzee. From behind bars, Frankie orchestrates his greatest coup yet.

Jackie and Ray both realize a distressing truth. Frankie feels threatened and Renee proves herself to be ruthless.

Owen is more dangerous than ever and he’s taking Sarah with him. Jackie unsuspectingly closes in on the prostitutes’ killer and Charmaine and Osito resume their partnership.