An off-duty diplomatic security agent is fatally shot in New York, leaving the team wondering it the shooting might be connected to his time working in Croatia.
The deputy commander of an Air National Guard Base is forced to give out access codes, leaving the team to track down the kidnapper and stolen ammunition.
The team investigates after a drug dealer is shot in a federal park, but the return of Maggie's sister ends up throwing a wrench in their investigation.
A money-laundering ring and two women, who previously avoided conviction, is discovered after Detective Benson's number is found on a dying person's phone.
When an undercover reporter posing as a prostitute turns up murdered, the trail leads police to a father trying to protect his imprisoned son from gang thugs.
Detectives are on the trail of a depressed wife suspected of killing a pregnant woman and stealing her baby, although someone else may have also been involved.
The facially-scarred daughter of Van Buren's friend is found dead, prompting a mission to find the assailant who threw acid on the girl months earlier.
A man is murdered after desecrating a valued edition of the Hebrew Torah, and as detectives investigate, they find he was paid by his cousin to defile the book.
Special Agent Pride and his team stumble upon a domestic drug ring run by Sonja's childhood friend after they trace hijacked Navy TNT to a cocaine warehouse.
A Navy Chief Warrant Officer is suspected of trying to sell recently stolen proprietary software used by the United States military to pilot combat drones.
The NCIS team travels to intercept a civilian research vessel in the North Atlantic that is carrying wounded Navy personnel, but nothing is what it seems.