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The Best Episodes of NCIS Season 21

Every episode of NCIS Season 21 ranked from best to worst. Discover the Best Episodes of NCIS Season 21!

The Best Episodes of NCIS Season 21

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...

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  1. 9.6/10(1.1k votes)

    #1 - The Stories We Leave Behind

    S21:E2

    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.

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  2. 8.8/10(505 votes)

    #2 - A Thousand Yards

    S21:E7

    NCIS 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.

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  3. 8.1/10(381 votes)

    #3 - Lifeline

    S21:E3

    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.

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  4. 8.0/10(429 votes)

    #4 - Algún Día

    S21:E1

    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.

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  5. 8.0/10(324 votes)

    #5 - Heartless

    S21:E8

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

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  6. 7.9/10(351 votes)

    #6 - The Plan

    S21:E5

    With 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.

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  8. 7.7/10(354 votes)

    #7 - Left Unsaid

    S21:E4

    The NCIS team is in a race against time to find a missing officer who disappeared during his wedding proposal.

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  9. 7.7/10(348 votes)

    #8 - Strange Invaders

    S21:E6

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

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  10. 7.7/10(327 votes)

    #9 - Reef Madness

    S21:E10

    Parker 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.

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  11. 7.2/10(327 votes)

    #10 - Prime Cut

    S21:E9

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

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Season 21 Ratings Summary

"The Stories We Leave Behind" is the best rated episode of "NCIS" season 21. It scored 9.6/10 based on 1139 votes. Directed by Michael Zinberg and written by Scott Williams, Brian Dietzen, it aired on 2/19/2024. This episode is rated 0.8 points higher than the second-best, "A Thousand Yards".