The NCIS team must help Torres when he puts his future at stake by confronting the man who tormented his family when he was a child.

As NCIS mourns the loss of Ducky, the agents find comfort in working on one of his unfinished cases involving a woman whose father was dishonorably discharged from the Marines.

The NCIS team experiences fresh views during Walk-a-Mile day, then Kasie receives an urgent mystery message.

The NCIS team races against time to find a missing Petty Officer who disappears during his marriage proposal.

NCIS Special Agent in Charge Feng Zhao, Knight's father helps the team unravel the mystery of a recently used service weapon belonging to a missing agent. McGee is in a tailspin when DNA results reveal a close relative he was unaware of.

After discovering a navy pilot's body riddled with unusual wounds, NCIS' investigation draws the team into the rabbit hole of UFO conspiracy theories.

NCIS comes under attack by a mysterious enemy from the past. Vance tries to mend fences with his estranged son by explaining why, despite the ongoing dangers of his job, he still chooses to stay at NCIS.

NCIS team looks for a motive behind the kidnapping and death of a famous heart surgeon.