A clinical trial of brain implants in veterans is hacked, and Patton must work alongside his ex-wife who spearheads the project.

A petty officer’s murder leads the team to a family-owned night club where Pride’s mother used to perform weekly. Also, Lasalle must urgently return home to Alabama after receiving an unexpected call from his family.

Percy and Lasalle go undercover at a high-stakes, underground poker game after the organizer targets players with access to a naval research laboratory. Also, Laurel Pride visits her dad during spring break to discuss options after her upcoming graduation.

Pride’s father, Cassius Pride, is wrapped up in an NCIS case involving a notorious unsolved casino heist from several years ago. Also, Pride meets a family member he never knew existed.

Pride and the team reunite with conspiracy journalist Oliver Crane after the source for his latest vigilante story is murdered. Also, Hannah’s former partner, Liam Somers, surprises her in New Orleans and shares a shocking revelation about an old case.

Tammy is convinced that a con man committed the hit-and-run murder of a Navy doctor, even though the evidence shows otherwise. Also, unbeknownst to Hannah, her husband, Ryan Porter, approaches Pride with new intel on Apollyon, the underground spy network responsible for murdering his father.

Pride travels to New York after new evidence links to a 20-year-old cold case from his time at Jefferson Parish Sheriff's office.

The team is concerned when Sebastian becomes unreachable while undercover as a new recruit.

When an NOPD officer is murdered, Pride and the NCIS team take on a group of dirty cops when they discover that the victim was also a key witness in multiple excessive force cases. Also, Tammy faces the reality of being in a new relationship.

After a Molotov cocktail is hurled into Pride's bar, evidence leads him directing to his old nemesis, Sasha Brousard, who has been keeping a secret that will affect his life forever. Also, Tammy uses her profiling skills on Hannah and Carter with shocking accuracy.