Gibbs starts his career as a newly minted special agent at the fledgling NCIS Camp Pendleton office, where he forges his place on a gritty ragtag team.

Gibbs and the gritty ragtag team continue their investigation at the fledgling NCIS Camp Pendleton office.

Still grieving the loss of his wife and daughter, Gibbs helps the team work a case involving a missing girl. The moment that irrevocably changed Gibbs' life is revealed.

With the countdown on to an execution, Franks races to extricate the location of a missing body from a death row inmate and honor a promise he made to the victim's sister before time runs out.

Gibbs goes undercover for the first time with Lala as NIS works the case of a dead Navy seaman who may have been sharing top-secret intel that poses a threat to national security. Also, Lala struggles with her place on the team and an unexpected development in her personal life.

Gibbs and the team investigate the case of a Navy priest who was killed in the confessional booth and may have been targeted by mistake. Meanwhile, Randy shows Gibbs the ropes of working a protective detail while struggling with a personal situation.

As Leroy Jethro Gibbs prepares for his first Christmas without his wife and daughter, flashbacks reveal the unlikely journey that led to his first day on the job as a special agent.

The team investigates the death of a famed Marine commander's son, while a pivotal part of Franks' past involving his family is revealed.

When the evidence room is broken into and significant cash goes missing, the team looks into a connection to a recent case. Also, Lala opens up to Gibbs, and Kowalski struggles to move forward.

The team works the case of an investment advisor found dead shortly after her release from prison. Also, Mary Jo is left reeling by an unexpected development in her personal life.

The team investigates the brutal murder of a military sergeant found burned in her car, a case Franks suspects could have a connection to the assault of his estranged wife.

Vera receives an unexpected call from Bugs, who claims he's ready to answer more questions from prison after being identified as the sniper known as Sandman.

After the shocking developments in the Sandman case, the team works with the FBI to investigate further; while Wheeler struggles to hold onto his job, his family reaches a crisis point.