When journalist Oliver Crane posts a scathing article documenting Pride's "reckless use of justice," the team is concerned about the fallout from the piece and the confidential information included in the story. Also, Rita Devereaux warns Pride that someone in D.C. has coordinated this attack on him, and the article is just the beginning.
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.
NCIS investigates the disappearance of a congressional aide after a hitman saves her from two men posing as NCIS agents. Also, Lasalle struggles with life-altering decisions regarding his brother's future.
FBI Special Agent Raymond Isler asks Pride for help with an off-the-books opioids theft investigation he is personally invested in. Also, Percy is sent undercover as a getaway driver with Isler as the muscle for a job tied to the case.
The NCIS team investigates the murder of a petty officer who was in town to help a refugee family being recruited by terrorists. Also, Wade works on the special election campaign for Mayor Zahra Taylor that takes place during Mardi Gras.
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.
Sebastian receives a plea for help from his high-school friend Adrian Conner after her business partner is killed at the Crescent City Gaming Convention. Also, FBI Special Agent Raymond Isler believes Adrian is a hacker the Cyber Crimes division has been tracking for years.
After Rita Deveraux tells Pride that Douglas Hamilton is about to make a deal to get out of prison, Pride and the team rehash the Clearwater case in hopes of locating his mystery partner and spoiling his bargaining chip.
Pride second-guesses evidence suggesting homeless kids are the suspects in the murder of a petty officer. Also: the band X Ambassadors perform "Ahead of Myself" and "The Devil You Know" at the New Orleans Tricentennial Festival.
Wade's son, Danny, calls Pride for help after he's attacked at his girlfriend's house and she is now missing. Also, the director of NCIS mandates that Pride meet with a therapist to discuss his process for solving cases.
Sebastian is placed on administrative leave after his response in a foot chase to apprehend a high-value fugitive is questioned by the FBI. Meanwhile, Pride and the team continue to track the target and try to clear Sebastian's name.
The NCIS team investigates the copycat murder of an unsolved case from 150 years ago that spawned a legendary New Orleans ghost story. Meanwhile, Gregorio gets spooked when the case is connected to a recent séance and a local medium.
Pride and his team join forces with FBI Director Isler when a Russian operative, who is in the U.S. to provide intelligence on sleeper agents, disappears after his Navy escort is murdered. Meanwhile, Tammy partners with former sleeper agent Eva Azarova to locate the missing operative Eva has known since childhood.
Season 4 begins with Pride still on probation six weeks after his rogue takedown of the corrupt Mayor Hamilton. Meanwhile, the team investigates an FBI case involving a stolen big rig of nuclear waste, unbeknownst to their new by-the-books supervisor.