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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!

Binge this in 7h 15m·Peaking at 9.6/10
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Episode Rankings

  1. #1 Fan Favorite
    NCIS Season 21 Episode 2 - The Stories We Leave Behind
    9.6/10(1522 votes)

    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.

    Director:Michael Zinberg
    Writers:Scott Williams, Brian Dietzen

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  2. NCIS Season 21 Episode 7 - A Thousand Yards
    8.8/10(612 votes)

    S21:E7

    NCIS comes under attack by a mysterious enemy from the past.

    Director:Diana Valentine
    Writer:Christopher J. Waild

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  3. NCIS Season 21 Episode 1 - Algún Día
    8.1/10(518 votes)

    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.

    Director:Diana Valentine
    Writer:Christopher J. Waild

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  4. NCIS Season 21 Episode 3 - Lifeline
    8.1/10(469 votes)

    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.

    Director:Rocky Carroll
    Writer:Marco Schnabel

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  5. NCIS Season 21 Episode 8 - Heartless
    8.0/10(409 votes)

    S21:E8

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

    Director:Michael Zinberg
    Writer:Sydney Mitchel

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  6. NCIS Season 21 Episode 5 - The Plan
    7.9/10(437 votes)

    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.

    Director:Lionel Coleman
    Writers:Katherine Beattie, Chad Gomez Creasey

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  7. NCIS Season 21 Episode 10 - Reef Madness
    7.7/10(421 votes)

    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.

    Director:José Clemente Hernandez
    Writer:Scott Williams

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  8. NCIS Season 21 Episode 4 - Left Unsaid
    7.6/10(436 votes)

    S21:E4

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

    Director:Daniela Ruah
    Writer:Yasemin Yilmaz

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  9. NCIS Season 21 Episode 6 - Strange Invaders
    7.6/10(436 votes)

    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.

    Director:Claudia Yarmy
    Writers:Steven D. Binder, Gina Gold, Aurorae Khoo

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  10. NCIS Season 21 Episode 9 - Prime Cut
    7.2/10(421 votes)

    S21:E9

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

    Director:Diana Valentine
    Writers:Marco Schnabel, Chad Gomez Creasey

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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 from 1,522 votes. Directed by Michael Zinberg and written by Scott Williams, Brian Dietzen, it aired on February 19, 2024. This episode is rated 0.8 points higher than the second-best, "A Thousand Yards".