After a mission in Mexico, Callen, Sam and Kensi must find a way home with an unconscious Deeks in tow; Mosely and retired Navy Admiral Hollace Kilbride look for assistance with their missing colleagues.
A prototype tactical assault suit is stolen from a Navy base and used in a jewelry heist; the team must determine who stole the suit and what their next target is; retired Navy Admiral Hollace Kilbride temporarily oversees the team.
Callen and Sam are assigned protection duty for Deputy Crown Prince Kamal after an assassin targets his decoy upon arrival in Los Angeles.
Members of the NCIS team are in danger after their pictures, as well as Mosley and her son's names, are included on a cartel hit list; Mosley is questioned about the off-the-books mission in Mexico.
While assisting the team with an undercover operation, an informant is arrested; Callen meets with ATF Agent Anna Kolcheck, who remains on suspension following her last joint case with NCIS.
The team attempts to locate Mosley after she murders a cartel hit man and goes off the grid.
The team partners with the State Department after the murder of an arms dealer is connected to a series of crimes seemingly executed by someone with elite special forces training; Callen visits ATF Agent Anna Kolcheck in prison.
Deputy Director Ochoa volunteers the team to assist with a covert operation aimed at taking down a terrorist group; Callen is concerned about what this kind of assignment may mean for the future of the team.
Robbers steal money, jewelry and highly classified information from a Navy captain's home; Deeks and Kensi interview candidates to manage the bar.
An elaborate bank heist to steal a single safe deposit box held by a Navy contractor leads NCIS to investigate her corrupt consulting firm.
The NCIS team searches for a Marine reservist with a history of post-traumatic stress disorder who disappears following a drunk and disorderly altercation.
The team investigates a possible terror threat after the chief of logistics for a naval weapons station collapses on the job; Kensi and Deeks research different honeymoon locations.
The team works with the Global Criminal Tribunal when a Syrian is attacked while delivering evidence that would prove chemical weapons were used on civilians; Kensi stays at the crime scene and comforts Sarraf, who is pinned behind a vehicle.
The NCIS team partners with the FBI to locate a terrorist cell in Los Angeles believed to be preparing for an imminent attack.
The team continues to search for a terrorist cell in Los Angeles; Callen and Sam remain trapped in a movie theater after multiple bombs have detonated, and every remaining exit is wired with explosives.
The NCIS team investigates the murder of a journalist who was writing an exposé on a mishandled classified military operation; as their wedding day quickly approaches, Kensi and Deeks work on the last remaining items on their to-do list.
After months of planning, the NCIS family celebrates the wedding of Kensi and Deeks; an old acquaintance pays Deeks a surprise visit on his wedding day.
Sydney turns to her sister Nell for help after her high school crush gets mixed up in a Russian plot to steal intelligence from the Department of Defense; Special Prosecutor John Rogers conducts mandatory performance reviews with the team.
Department of Justice Agent Lance Hamilton asks Sam for assistance in locating a former U.S. Border Patrol tactical officer who disappeared following a threat by the cartel.
After a Navy SEAL is attacked while moonlighting at a security job for a successful marijuana dispensary, Sam personally vows to apprehend the suspect out of respect for the Navy SEAL brotherhood.
After Anna Kolcheck escapes from prison with her cellmate, Callen and the NCIS team assist with the investigation and try to locate her.
The NCIS team travels to Cuba for an unsanctioned mission after Callen gets a lead on Anna Kolcheck's whereabouts.
Callen and Sam travel to the USS Allegiance in the Persian Gulf to work with Navy Capt. Harmon "Harm" Rabb Jr. when the team learns about ISIS sympathizers who are targeting military locations.