False Flag – In the Season 10 finale, 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, Navy Lieutenant Colonel Sarah “Mac” Mackenzie, to help obtain information from a Russian diplomat.
The Guardian – 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 locations.
No More Secrets – The NCIS team travels to Cuba for an unsanctioned mission after Callen gets a lead on Anna Kolcheck’s whereabouts.
The One That Got Away – Anna Kolcheck escapes from prison with her cellmate. Callen and the NCIS team assist with the investigation and search for her whereabouts.
Choke Point – A Navy Seal is attacked while moonlighting at a security job for a successful marijuana dispensary, and Sam personally vows to apprehend the suspect out of respect for the Navy Seal brotherhood.
Searching – DoJ 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 CID Special Agent Steve Evans partner on a dangerous mission to recover a stolen hard drive with sensitive military intelligence on it.
Born to Run – 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.
Into the Breach – 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.
Smokescreen, Part 2 – The team continues to search for a terrorist cell in L.A., while Callen and Sam remain trapped in a movie theater after multiple bombs have detonated and every remaining exit is wired with explosives.
The Sound of Silence – The chief of logistics for a naval weapons station collapses on the job, and the NCIS team must determine if it’s a terror threat or a stress-induced breakdown. Also, Kensi and Deeks research different honeymoon locations.