A Navy lieutenant on shore leave dies of the bubonic plague, sending the New Orleans team into a tailspin to locate all other sailers on liberty to control an outbreak and find the source. Special Agent Tony DiNozzo gives a helping hand.

An armored transport bus with Naval brig detainees on board crashes and four prisoners manage to escape.

After a Navy SEAL is discovered dead in a sorority house, the team need to work out if his death was due to collegiate foul play or a classified mission.

While a chief warrant officers' death is investigated, the agents discover that his wife has been abducted. Fornell assists with the case.

New Orleans is decorated for Halloween as the team investigate the murder of a Naval Staff Judge Advocate discovered in a cemetery dressed in a Victorian costume with puncture wounds on her neck.

The team investigate the murder of a tech liaison, who had been assigned to a private developer.

A petty officer is discovered dead in a Mardi Gras float storage facility with an engagement ring. Things take a a mysterious turn after the team are unable to find his supposed girlfriend.

A stolen Navy-issue gun appears to belong to a petty officer who died 40 years ago, meaning the team have to re-open a cold case. The team celebrate Thanksgiving.

A retired SEAL, who managed to track people impersonating military personnel is discovered dead.

The NCIS team investigates a deadly explosion at the Navy-Marine Corps Relief Gala, and discover Pride was the intended target of the bomb.

When a Navy Admiral’s daughter is the prime suspect in a double murder case aboard a research boat, the NCIS team partners with the Coast Guard Investigative Service (CGIS) to work the case. Meanwhile, Lasalle tracks down his estranged brother.

A Navy Lieutenant Commander in impeccable shape turns to Pride and the NCIS team to solve his imminent murder after discovering he has been poisoned with a lethal dose of radiation.

After an NCIS agent is killed during a security detail for the Vice Chief of Naval Operations, the team must determine if this was an assassination attempt or if someone is targeting one of their own. Meanwhile, Agent Brody is placed under investigation and her mysterious past is reevaluated.

A petty officer is murdered during Mardi Gras festivities; Pride contemplates what to tell his daughter about his strained relationship with his father.

The NCIS team tries to narrow down the motive when a Navy recruiter is murdered in a hit-and-run; Lasalle worries about his brother.

Pride is adamant the elusive “Baitfish” has returned and, in attempt to locate his nemesis, he has the team investigate crime scenes and chase leads from New Orleans to Charleston, SC.

After a sailor is murdered in the champagne room of a strip club, the NCIS team links the murder weapon to two additional unsolved cases and discovers that the names of all three victims appear on a mural in a dilapidated part of town. Also, Brody’s ex-fiancé pays her a surprise visit.

While conducting an autopsy on a Petty Officer who is believed to have died from natural causes, an armed man enters the morgue and holds Wade, Sebastian and Danny hostage.

When a Navy Commander’s car is stolen with his baby inside, the NCIS team must determine if this was a random carjacking or a targeted abduction.

With no memory of the night before, Lasalle’s brother, Cade, turns to NCIS for help when he finds his girlfriend’s body in the trunk of his car. Despite a mountain of evidence that implicates Cade, and the case being under Captain Jim Messier and Jefferson Parish jurisdiction, Lasalle is determined to prove his brother’s innocence.

To send a message to Pride, Baitfish murders someone close to the NCIS team, prompting a citywide manhunt for the elusive criminal.

Pride (Scott Bakula) suspects a mole among the ranks as NCIS and local law enforcement continue to track the Broussard Syndicate after new intelligence suggests a breach at the ports.