After a federal judge disappears, a routine investigation takes a dark turn as the team uncovers that the judge had been searching for his missing son on a secluded island on the city’s edge, where authority has crumbled. Meanwhile, reality weighs heavy on Jubal as he takes on a new leadership role.

When paintings from a high-profile international cultural exchange are stolen – leaving a security guard dead – the team races to recover the priceless artworks. Meanwhile, Maggie turns to a friend for help profiling suspects.

Scola and his new partner Agent Ramos hit a roadblock after a young man is found beaten to death on federal land and their case intersects with a DEA operation. A shake-up inside of the JOC rocks the team's world.

Following a failed assassination attempt on a U.S. Senator, OA and Maggie are tasked with escorting her back to DC on a flight that becomes more perilous than imagined.

Maggie partners with Eva to hunt a killer after a shocking daytime stabbing in an NYC park. After a subsequent murder, they realize the assassin has a hit list, begging the question: "Who's on it and who's next?"

When a robbery at a community clinic turns deadly, the team investigates a drug trafficking crew and soon uncovers that the clinic's doctor may be more involved than they initially thought. Meanwhile, Isobel and her stepdaughter are at odds over a family issue.

When a large-scale explosion rocks a Brooklyn apartment complex, the team quickly locates the perpetrator and discovers he's acting on the orders of a convicted felon currently serving time. Meanwhile, Isobel must name her successor before she moves into her new role.

When a journalist is shot while interviewing a prime minister, all fingers point to an assassination attempt, but the team uncovers a deeper conspiracy after the assassin is also targeted. Meanwhile, OA struggles to let Gemma in on the dangers of his job.

As the holidays approach, the team finds three slain sex workers inside a brownstone – they uncover the murderer has a larger plan in place that they must rush to stop. Meanwhile, Jubal receives a concerning call from his son Tyler.

Chaos erupts in the city when an attack disrupts cell, internet and emergency services. As the team races to uncover the culprits, they learn the group responsible is a radical accelerationist movement fixated on resetting society.