
Chris O'Donnell and LL Cool J star in this second show in the "NCIS" franchise, focusing on the high-stakes world of the Office of Special Projects (OSP) in Los Angeles. Highly trained agents use the most-advanced technologies available and go under cover to apprehend criminals deemed a threat to national security. Special Agent G. Callum can transform himself into whoever he needs to be to infiltrate criminal factions. His partner, former Navy SEAL Sam Hanna, is a surveillance specialist who uses state-of-the-art equipment to monitor field agents and feed them information.

The team investigates a ransomware attack that disrupts the entire power grid and paralyzes the city; Sam struggles to find a way for his family to celebrate the holidays after his wife's death.

After napalm is detected at a crime scene, the team investigates the sole casualty for possible links to terrorism.

Hetty is being tortured by her captors in Vietnam; Eric and Nell find a clue to her whereabouts; the team organizes a rescue mission.

NCIS joins Hetty's team from the Vietnam War in a dangerous rescue mission to save Hetty from her captors in Vietnam; Mosley calls in Nell's sister to assist the team in Los Angeles with processing evidence connected to Hetty's time in Vietnam.