NCIS

Season 21

TV-14

From murder and espionage to terrorism and stolen submarines, a team of special agents investigates any crime that has a shred of evidence connected to Navy and Marine Corps personnel, regardless of rank or position.

Where to Watch Season 21

10 Episodes

Algún Día
E1
Algún DíaThe 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.
The Stories We Leave Behind
E2
The Stories We Leave BehindAs 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.
Lifeline
E3
LifelineWhen 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.
Left Unsaid
E4
Left UnsaidThe NCIS team is in a race against time to find a missing officer who disappeared during his wedding proposal.
The Plan
E5
The PlanWith the help of Knight's dad, NCIS works to unravel the mystery of a recently used service weapon belonging to a missing agent. Also, McGee is in a tailspin when DNA results reveal a close relative he was unaware of.
Strange Invaders
E6
Strange InvadersAfter discovering a navy pilot's body riddled with unusual wounds, NCIS' investigation draws the team into the rabbit hole of UFO conspiracy theories.
A Thousand Yards
E7
A Thousand YardsNCIS comes under attack by a mysterious enemy from the past. Also, 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.
Heartless
E8
HeartlessThe NCIS team looks for a motive behind the kidnapping and death of a famous heart surgeon.
Prime Cut
E9
Prime CutAfter discovering the remains of a Marine captain, the NCIS team travels to Texas to interrogate the suspected killer.
Reef Madness
E10
Reef MadnessParker and Knight discover three bodies on an old Navy ship that's about to be sunk and turned into an artificial reef, when they're suddenly locked inside by a mysterious figure. Also, Vance offers Knight a unique opportunity.