NCIS: Origins Show Summary, Upcoming Episodes and TV Guide

When the murder of Pedro Hernandez is unearthed, Gibbs faces a reckoning. But when he needs his team most, the loyalty of one is brought into question.

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.' When she arrives, Bugs has suddenly changed his mind, prompting the team to reconsider the case and race against the clock to try and stop another tragedy.

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.

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.

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.

Gibbs and the team investigate the case of a Navy priest who was killed in the confessional booth; Randy shows Gibbs the ropes of working a protective detail.

Gibbs goes under cover 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; Lala struggles with an unexpected development in her personal life.

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.

Gibbs and the team continue their investigation.