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1. Bölüm Callen and Sam work with Navy Capt. Harmon Rabb, Jr. to apprehend spies aboard the USS Allegiance. Also, Hetty partners with Marine Lt. Col. Sarah “Mac” Mackenzie 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 by ISIS.
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2. Bölüm Faced with multiple cases worldwide, the NCIS team splits up, with Callen and Sam working with Mossad Agent Eliana Sapir in Tel Aviv, and Kensi partnering with DOJ Agent Lance Hamilton in Los Angeles.
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3. Bölüm Callen and Sam run protection detail for retired Navy Admiral Kilbride in an operation to locate a missing Naval intelligence officer.
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4. Bölüm While Callen and Sam are aboard the USS Allegiance, the ship is placed under quarantine for possible Ebola exposure. Also, Kensi and Deeks investigate the murder of a petty officer who recently departed the USS Allegiance and is linked to the Ebola exposure.
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5. Bölüm The NCIS team searches for a stolen painting valued at $40 million after online chatter indicates the artwork is being sold on the black market to fund terrorist activity.
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6. Bölüm The NCIS team reluctantly aligns with two former criminals from England, Ricky Dorsey and Frankie Bolton, after a powerful arms dealer kidnaps Ricky’s daughter in an attempt to obtain a dangerous weapons system.
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7. Bölüm The NCIS team links the theft of an undersea drone prototype to a video game streamer’s elaborate party. Also, Callen and Sam cross paths again with insurance broker Katherine Casillas, who insures the gamer’s property and processions.
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8. Bölüm After a Navy lieutenant disappears from the scene of a car accident, the NCIS team processes the crime scene and discovers his laptop is missing along with recently accessed confidential information for retired Navy SEALs.
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9. Bölüm Callen and Sam travel to San Francisco to search for Beale after he's kidnapped during a clandestine mission for Hetty.
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10. Bölüm Akhos Laos , a former black ops agent originally recruited and trained by Hetty Lange, returns to seek revenge on Hetty for the life she introduced him to, on the 250th episode
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11. Bölüm While the team investigates the theft of a computer virus, Callen and Sam consider their future at the agency, Kensi and Deeks discuss having children, and Eric and Nell analyze the impact of Eric’s undercover assignment on their relationship. Also, the team tracks Mara a crooked upscale banker
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12. Bölüm CIA Officer Veronica Stephens asks the team for help when an agricultural engineer Hetty asked her to bring to the United States disappears
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13. Bölüm After a rise in deaths caused by black market opioid use, the NCIS team links the street drug to funding for terrorist activities
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14. Bölüm The NCIS team investigates the murder of a Naval warfare engineer at a spoken poetry event. Also, Callen asks Nell to assist him in a worldwide search for Anna's whereabouts.
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15. Bölüm Anna Kolcheck returns to warn Callen that he is in danger and he must now work with an archenemy to stop an underground trafficking ring.
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16. Bölüm When Fatima is captured while on a mission and held for ransom, Callen and Sam enlist a deep undercover CIA agent, Kadri, to help get her back.
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17. Bölüm When an FBI agent is killed while trying to track the location of an undercover agent, NCIS must find the missing agent before the criminals he was investigating do
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18. Bölüm While NCIS investigates the disappearance of a department of defense officer who was looking into a recent UFO sighting, Anna makes a bold decision about her future.
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19. Bölüm While Sam investigates the murder of an Iranian exile working to overthrow the current regime, he must also try to save Agent Rountree, a new agent who’s having an unexpectedly adventurous first day on the job, when he accidentally triggers a bomb. Also, Nell makes a decision about her future with NCIS.
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20. Bölüm The team assists the DOJ in the investigation of an arsonist who targets an FBI safe house that's protecting a political activist seeking asylum; Eric deals with the aftermath of Nell leaving the team.
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21. Bölüm The team helps a former NCIS tech operator search for her missing ex-partner, whom they fear might be working with the gun runners they failed to take down years ago; Deeks reels when his bar gets a negative review.
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22. Bölüm Sam, Callen and Rountree travel to Afghanistan when Marine Lieutenant Colonel Sarah "Mac" MacKenzie asks NCIS to help with a sensitive case after two SEALs claim their chief murdered an unarmed prisoner.