Plot Synopsis

Special Agents 'G' Callen and Sam Hanna go deep undercover for the Office of Special Projects (OSP), a division of NCIS that is charged with apprehending dangerous and elusive criminals that pose a threat to the nation's security. They assume false identies and utilize the most advanced technologies, putting their lives on the line to bring down their targets. Assisting the team is: the all-knowing Henrietta "Hetty" Lange who oversees the staff and is tasked with providing everything from micro-surveillance cameras to cars for the team; Special Agent Kensi Blye, the exceptionally bright daughter of a slain Marine who lives for the adrenaline rush that comes with undercover work; Marty Deeks, a seasoned LAPD undercover detective who was recruited to the team by Hetty; Tech Operator Eric Beale, who has mastered every gadget and computer in the Ops Center; and the recent addition, Intelligence Analyst Nell Jones, who won the team's respect with her spot on intelligence assessments and her shrewd insights. At the end of the third season, Callen shot the Chameleon in public, and starts Season 4 on probation. Plus, in the new season Hetty must adjust to retired life after her resignation.

NCIS: LA returned for its fifth season when CBS aired the season premiere on Tuesday, September 24, 2013 at 9pm ET/PT, as Sam and Deeks recover from traumatic torture that will have a lasting impact on their personal and professional relationships. Meanwhile, lives were still in jeopardy as the NCIS: LA team searched for stolen nuclear weapons.

Season 6 of NCIS: LOS ANGELES premiered on Monday, September 29, 2014 at 10pm ET/PT on CBS. The season opener, "Deep Trouble (Part 2)," continues the story from the Season 5 finale. At the end of last season, Callen and Sam had to locate a missing submarine that a cartel was using to transport billions of dollars' worth of cocaine from Colombia to the United States. Now, in the new episode, Callen and Sam are trapped in an armed submarine that terrorists have aimed to hit an aircraft carrier in San Diego. Meanwhile, Hetty defies orders and forgoes her trip to Washington in the aftermath of the controversial mission in Afghanistan, as the team tries to locate and save Callen and Sam and prevent the terrorist attack.

NCIS: LOS ANGELES returned for its seventh season on Monday, September 21, 2015 at 10pm ET/PT on CBS. In the season opener, "Active Measures," Callen goes rogue and embarks on a secret mission that leaves Sam and the team in the dark, so Hetty demands that his operation be shut down and tasks the team with finding him.

Season 8 of NCIS: LOS ANGELES premiered on Sunday, September 25, 2016 from 8:30-10:30pm ET/8-10pm PT on CBS. In the two-hour season opener, "High-Value Target; Belly of the Beast," after NCIS fails to locate a mole in the department, Under Secretary of Defense Corbin Duggan (guest star Jackson Hurst) insists on new leadership and takes over the Los Angeles unit from Hetty and Granger. Also, the team travels to Syria to apprehend a High Value Target where one team member is severely injured when the mission goes awry.

The ninth season of NCIS: LOS ANGELES premiered on Sunday, October 1, 2017 at 9:30pm ET/9pm PT on CBS, with Nia Long joining the cast for the new season. Long plays the team's new executive assistant director, Shay Mosely. As a former Secret Service agent now working for the Naval Criminal Investigative Service, Mosely is an experienced Washington insider who brings an east coast style and demeanor to the west coast team. In the season opener, "Party Crashers," after Hetty turns in retirement papers and then disappears, Executive Assistant Director Mosley arrives in Los Angeles to oversee the team and immediately makes staffing changes. Also, still mourning the death of his wife and living in a trailer on the beach, Sam is adamant that Callen find a new partner.

Season 10 of NCIS: LOS ANGELES premiered on Sunday, September 30, 2018 at 9:30pm ET/9pm PT on CBS. In the season opener, "To Live and Die in Mexico," 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, Mosely and retired Navy Admiral Hollace Kilbride (guest star Gerald McRaney) beseech their contacts in Mexico and D.C. for assistance with their missing colleagues. On Sunday, January 6, 2019 at 9pm ET/PTPT, CBS debuted "The Sound of Silence," the mid-season premiere of NCIS: LOS ANGELES. 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.

NCIS: LOS ANGELES returned for its 11th season on Sunday, September 29, 2019 at 9:30pm ET/9pm PT on CBS. In the season opener, "Let Fate Decide," Callen and Sam work with Navy Capt. Harmon Rabb, Jr. (guest star David James Elliott) to apprehend spies aboard the USS Allegiance. Also, Hetty partners with Marine Lt. Col. Sarah 'Mac' Mackenzie (guest star Catherine Bell) to neutralize a missile attack in the Middle East, and Kensi and Deeks are trapped in a mobile CIA unit in Iraq while under attack. On Sunday, January 5, 2020 at 9pm ET/PT, CBS debuted "Groundwork," the winter premiere of NCIS: LOS ANGELES, with Dina Meyer guest starring as CIA Officer Veronica Stephens, who asks the NCIS team for help when an agricultural engineer Hetty asked her to bring to the United States disappears.

Season 12 of NCIS: LOS ANGELES premiered on Sunday, November 8, 2020 8:30pm ET/8pm PT on CBS. In the season opener, "The Bear," a Russian bomber goes missing while flying over U.S. soil; Callen and Sam must track it down in the desert and secure its weapons and intel before the Russians on board destroy the plane. Also, Hetty gives Nell a cryptic assignment. After a three-week break, NCIS: LOS ANGELES returned for its winter premiere on Sunday, January 3, 2021 at 8:30pm ET/8pm PT on CBS. (The East Coast time may be later if the NFL game ends later than 7:30pm ET.) In the mid-season debut, "Overdue," the NCIS team's murder investigation of a man who sold military information leads to the abduction of a doctor whose cutting edge neurotechnology could be developed into advanced weaponry. Also, team members are interviewed by FLETC to see if Deeks would make a good NCIS agent, and Callen tries to have an important talk with Arkady.

CBS premiered the thirteenth season of NCIS: LOS ANGELES on Sunday, October 10, 2021 at 9pm ET/PT on CBS. In the season opener, "Subject 17," Callen suspects Hetty of keeping secrets about his past and Joelle surfaces in her quest to capture Katya; meanwhile, NCIS must track down an informant whose life is in danger. Also, Kensi and Deeks work to expand their family. On Sunday, January 2, 2022 at 9pm ET/PT, CBS debuted "Lost Soldier Down," the winter premiere of NCIS: LOS ANGELES, which is directed by series star Daniela Ruah. NCIS investigates the apparent suicide of a Navy intelligence officer who leapt to his death after taking LSD. Also, while Kensi is away, Deeks makes plans to redo the backyard without her input.

For its 14th season, NCIS: LOS ANGELES moved to a new timeslot -- 10pm on Sundays -- beginning October 9, 2022. In the season opener, "Game of Drones," the NCIS team searches for a suspect and their motive following the bombing of a large facility where military combat drones are assembled. Also, Callen and Kilbride get troubling news about a body found in Syria. After a six-week break, NCIS: LOS ANGELES returned with new episodes on Sunday, January 8, 2023 at 9:30pm ET/9pm PT on CBS. In the winter premiere, "Blood Bank," when NCIS investigates a shootout on a boat in which a rare cultural artifact is stolen, they're shocked to learn who owns the boat. One day after its winter premiere, NCIS: LOS ANGELES was part of a three-episode NCISverse crossover event with NCIS and NCIS: HAWAI'I on Monday, January 9, 2023 on CBS. The event centers around a very personal, high-stakes case to take down a mysterious hitman. Team members from the different NCIS divisions come together in Washington, D.C., to celebrate a beloved FLETC (Federal Law Enforcement Training Center) professor who taught multiple members of each of the squads. On the eve of the celebration, the professor is found dead of an apparent suicide and his former students immediately suspect foul play. While investigating his past, they uncover a mysterious hitman, and the more they dig into it, the bigger the targets on their backs become. Members of the team are suddenly kidnapped and all the agents must come together to take down the assassin and save their own.
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NCIS: LOS ANGELES ends its 14-season run with a two-part series finale on Sunday, May 14 at 10pm ET/PT and Sunday, May 21, 2023 at 9pm ET/PT on CBS, immediately followed by a ENTERTAINMENT TONIGHT special. NCIS: LOS ANGELES will have aired 322 episodes including the series finale. "Wrapping up a series is always bittersweet. We were blessed to have 14 seasons together, so bringing it to a satisfying end was extremely challenging after so many years. Fortunately, CBS was gracious enough to give us an extra episode in order to send off our characters in a way befitting their stories that hopefully the fans find both satisfying and hopeful," said showrunner and executive producer R. Scott Gemmill.

"New Beginnings" (Sunday, May 14, 2023 at 10pm): When an ATF agent goes missing, the agency seeks help from the NCIS team to investigate stolen military-grade weapons and locate the agent. Also, Callen and Anna continue to plan their wedding, Rountree's sister interviews for medical school and Sam encourages his father to take part in the drug trial.

"New Beginnings (Part 2)" (Sunday, May 21, 2023 at 9pm): The NCIS team continues the case with ATF and the stolen military-grade weapons. Also, Callen and Anna decide on an impromptu wedding.

ENTERTAINMENT TONIGHT special (Sunday, May 21, 2023 at 10pm): Kevin Frazier hosts from the iconic Paramount Studios where NCIS: LOS ANGELES filmed for 14 years. The one-hour special features footage and interviews with NCIS: LOS ANGELES cast members from the past 14 years, including current exclusive interviews, favorite memories and behind-the-scenes moments from the ENTERTAINMENT TONIGHT vault.