Callen and Sam work with Navy Captain Harmon "Harm" Rabb, Jr. to locate a group of ISIS sympathizers aboard the USS Allegiance. Also, Hetty enlists her friend Lieutenant Colonel Sarah "Mac" Mackenzie, to help obtain information from a Russian diplomat.

Callen and Sam travel to the USS Allegiance in the Persian Gulf to work with Navy Captain Harmon "Harm" Rabb, Jr. when the NCIS team uncovers ISIS sympathizers who are targeting military.

The NCIS team travels to Cuba for an unsanctioned mission after Callen gets a lead on Anna Kolcheck's whereabouts.

After Anna Kolcheck escapes from prison with her cellmate, Callen and the NCIS team assist with the investigation and search for her whereabouts.

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.

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. Also, Kensi and Army Criminal Investigative Department Special Agent Steve Evans partner on a dangerous mission to recover a stolen hard drive with sensitive military intelligence on it.

Sydney turns to her sister Nell for help after her high school crush, Andre Martinez, is mixed up in a Russian plot to steal intelligence from the Department of Defense. Also, Special Prosecutor John Rogers conducts mandatory performance reviews with the team.

After months of planning, the NCIS family celebrates the wedding of Kensi and Deeks. Also, an old acquaintance, Anatoli Kirkin, pays Deeks a surprise visit on his wedding day and he isn't alone.

The NCIS team investigates the murder of a journalist who was writing an exposé on a mishandled classified military operation. Also, as their wedding day quickly approaches, Kensi and Deeks work on the last remaining items on their to-do list.

As 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 partners with the FBI to locate a terrorist cell in Los Angeles believed to be prepping for an imminent attack.

The NCIS team works with the Global Criminal Tribunal when a Syrian seeking justice, David Sarraf, is brutally attacked while delivering evidence that would prove chemical weapons were used on civilians. Also, Kensi stays at the crime scene and comforts Sarraf who is pinned behind a vehicle.

After the chief of logistics for a naval weapons station collapses on the job, the NCIS team must determine if this is a terror threat or a stress-induced breakdown. Also, Kensi and Deeks research different honeymoon locations

The NCIS team is joined by NCIS Special Agent Nicole DeChamps after a Marine reservist with a history of PTSD disappears following a drunk and disorderly altercation.

An elaborate bank heist to steal a single safe deposit box held by Veronica Stephens, a Navy contractor, leads NCIS to investigate her corrupt consulting firm.

The NCIS team investigates the home invasion of Navy Captain Dean Hadlow, who was entertaining his friend, General Omer Abidi of Pakistan, when robbers successfully stole money, jewelry and highly classified information. Also, Deeks and Kensi interview candidates to manage the bar.

Deputy Director Ochoa volunteers the NCIS team to assist with a covert operation tied to a terrorist group advocating for extreme military force. Also, Callen has concerns as to what an assignment of this nature could mean for the future of the team.

The NCIS 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. Also, Callen visits ATF Agent Anna Kolchec in prison as she awaits her sentencing.

The NCIS team attempts to locate Mosley after she murders a cartel hitman and goes off the grid.

While assisting NCIS with an undercover operation, informant Elizabeth Williams is arrested and the team is unable to provide her with an alibi. Also, Callen meets with ATF Agent Anna Kolcheck who remains on suspension following her last joint case with NCIS.

The NCIS team is in danger after their pictures, as well as Mosley and her son's names, are included on a cartel hit list. Also, NCIS Deputy Director Louis Ochoa arrives with Special Prosecutor John Rogers to interview Mosley about the off-the-books mission in Mexico.

Callen and Sam are assigned protection duty for Deputy Crown Prince Kamal after an unknown assassin targets his decoy upon his arrival in Los Angeles.

After the prototype for a tactical assault suit is stolen from a Navy base and used in a Beverly Hills jewelry heist, the team must determine who stole the suit and what their next target is. Also, retired Navy Admiral Hollace Kilbride temporarily oversees the team while Mosley and Hetty face repercussions for the unsanctioned Mexico mission.

Gravely injured and unable to communicate with the team in the U.S., Callen, Sam and Kensi, with an unconscious Deeks in tow, search for a safe way home as a cartel boss places a "dead or alive" bounty on their heads. Also, Mosley and retired Navy Admiral Hollace Kilbride beseech their contacts in Mexico and D.C. for assistance with their missing colleagues.