Reeling from his father’s murder, Parker goes to extreme lengths to hunt down the woman he holds responsible, mob boss Carla Marino, jeopardizing not only his own future but the team’s.

Parker’s pursuit of vengeance for his father’s murder could have deadly consequences, while his sister, Navy vice admiral Harriet Parker, faces an impossible choice.

When a petty officer’s death is connected to a blackmail investigation, the team is forced to work with Special Agent Sawyer on the case, which takes a terrifying turn for Torres. Meanwhile, Knight is offered an opportunity to train with NCIS Elite.

The team investigates a U.S. marine who is believed to have kidnapped a man's wife.

The cold case of a small-town death of a naval officer in the ‘90s is unexpectedly re-opened in the present day, sending the team on a manhunt for justice. The crossover starts on NCIS: Origins S02E05 Funny How Time Slips Away (I).

A kidnapped teen leads the team to a Navy SEAL who survived captivity by the Taliban but may have committed murder after returning home. Also, Jimmy finally shares his findings about the mysterious death of Parker’s mother with his boss.

When a man is shot by the Secret Service outside the vice president’s official residence, NCIS is aided in the case by a new member of the team: an AI chatbot being beta-tested by the Department of Justice.

McGee and Torres try to recover a stolen truck filled with toys for the Navy’s annual Christmas drive while the truth about Parker’s mother is finally revealed. Also, Knight is given her first NCIS: Elite mission, which involves tracking down a former member of the team.

On her first NCIS: Elite mission, Knight is given orders to hunt down and arrest Eleanor Bishop after the former member of the NCIS team is designated a wanted cyber-terrorist. In need of someone to trust, Bishop turns to Torres, and the two come face to face for the first time since she abruptly left nearly five years ago.