Season 21

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.

When the NCIS team engages in Walk-a-Mile day to gain a new perspectives on different departments, things take a turn when Kasie receives a distress call from a mysterious man.

With the help of Knight's dad, NCIS works to unravel the mystery of a recently used service weapon belonging to a missing agent.

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.

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

After discovering the remains of a Marine captain, the NCIS team travels to Texas to interrogate the suspected killer.