Eric witnesses his friend, a computer systems expert, being attacked by people who want information that could redirect a missile; Kensi runs into a familiar face in Afghanistan.

After Deeks and Kensi work under cover to investigate the murder of a homeless man they discover a connection to a Mexican cartel.

After Callen’s father, Garrison is found in an NCIS patient’s hospital room during a radiation poisoning case, Callen must take him to the boatshed for interrogation. Also, the team discusses their Thanksgiving plans.

When a Navy lieutenant and his grandfather are kidnapped from a retirement home, the team's investigation leads them to a con artist couple and the hunt for a rare coin; Callen meanwhile has to deal with his father's actions when he kidnaps the father of his grandson (and Callen's nephew).

After a highly decorated Navy Captain, Charles Langston, kidnaps a Veterans Affairs administrator who has been siphoning funds, the NCIS team must work with Hetty’s former Vietnam War colleagues, now-retired Admiral AJ Chegwidden and Admiral Sterling Bridges to solve the case.

Callen and the team question CIA Agent Joelle Taylor's backstory after she escapes from a kidnapping and turns to Callen for help.

Callen pursues every alternative when the Diplomatic Security Service apprehends his father, Nikita Aleksandr Reznikov, as part of an exchange for two American photographers being held hostage in Iran.

Callen, Sam and Nell must find pieces of a failed rocket launch, including a top-secret government device; Hetty tries to help Keane acclimate to life in the states.

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.

The NCIS team partners with the FBI to locate a terrorist cell in Los Angeles believed to be preparing for an imminent attack.

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

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

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.

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.

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.

Before Christmas, Hetty assigns Callen the case of his former foster brother and his wife who, upon reentry into the U.S., are framed for smuggling drugs across the border in her oxygen tanks. Also, Deeks is struggling with losing his job at NCIS.

To rescue Joelle from further torture by the Russians, Callen and NCIS must offer up Anna as bait to Katya. Also, Callen finally discovers who accused him of being Russian spy.

When an NCIS mission to protect a compromised undercover agent goes completely sideways, the agents are individually interrogated to find out what really happened. Also, Kilbride must make a difficult decision.

The NCIS team helps Naval intelligence officer Akhil Ali locate a fellow officer who went missing while recruiting foreign assets as potential sources of intelligence. Also, Callen and psychologist Nate Getz track down a man Callen believes was present for his training when he was young.