ג'קי מנסה למצוא את דרכו לאחר שהוא התפטר. דקורסי מקבל הזדמנות לקידום בעבודה, אבל מקבל חדשות מטרידות. אירוע הירי בקמפבל מתפתח למקומות לא צפויים.

דקורסי מנסה לעזור לאביו הגוסס, שמסרב לקבל טיפול. שובאן מנסה ללחוץ על חברת הבנייה הענקית כדי שתקבל אחריות על תאונת העבודה. ג'קי עוזר לדריידן להתמודד עם ויקטוריה.

ג'קי נכנס יותר ויותר לתסבוכת של משפחת דריידן. ג'ני מגלה שיש השלכות למפגש האלים שלה עם אביה. דקורסי מקבל תיק שהוא לא בטוח שהנתבע באמת אשם בו. שובאן מקבלת תזכורת מעברה אשר מערערת אותה.

As Jackie continues his fling with Letitia Dryden, Jenny sets out to get her husband reinstated in the FBI. The pressure on Decourcy mounts when a colleague competing for the position of DA lands a conviction. Caysen testifies at the federal trial of Tony Suferin and is blindsided by the consequences. A threatening interaction offers Siobhan a sense of what exactly she is up against in her fight for the Mendoza family.

With the evidence against Sinclair Dryden piling up, Jackie takes action. As Decourcy fights to prove Curtis Whitaker’s innocence, Caysen, who is desperate to clear his own name, entertains a compromise. Siobhan makes headway in her case against Needham Industries but is set back when a reporter comes asking questions. Jenny meets with a lawyer to discuss her father’s lawsuit.

Jackie shows a glimpse of vulnerability when a violent attack stalls the Dryden investigation, but Decourcy presses on, tracking down a list of Sinclair’s potential victims. Caysen is formally brought on as an investigator in the DA’s office, where he must navigate competing interests. Siobhan weighs risking everything she has built to reveal the truth about her past. Jenny’s suspicions are reinforced. 

As Jenny grows closer to Diarmuid Doyle, her unwitting husband Jackie is released from the hospital — and he’s after revenge. Siobhan calls on Decourcy for help cornering Needham Industries as she fights to expose the corporation’s malfeasance. After a break in the case against Sinclair Dryden, the DA’s office bumps up against an unforeseen obstacle.

As Decourcy prepares to take Sinclair Dryden to trial, despite pushback from the Suffolk County DA, Jackie tracks down a key witness. Siobhan reaches a settlement on behalf of the Mendoza family, but her moment in the spotlight is cut short. Caysen is offered a second chance by a loved one. Reckoning with the rifts in her own family, Jenny meets her long-lost half-brother. Season finale.