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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!

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...
Genres:CrimeDramaAction & Adventure
Network:CBS

Season 21 Ratings Summary

"Algún Día" is the best rated episode of "NCIS" season 21. It scored 8/10 based on 389 votes. Directed by Diana Valentine and written by Christopher J. Waild, it aired on 2/12/2024. This episode is rated 1.6 points higher than the second-best, "The Stories We Leave Behind".

  • Algún Día
    8.0/10389 votes

    #1 - Algún Día

    Season 21 Episode 1 - Aired 2/12/2024

    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

  • The Stories We Leave Behind
    9.6/101,042 votes

    #2 - The Stories We Leave Behind

    Season 21 Episode 2 - Aired 2/19/2024

    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

    Writer: Scott Williams, Brian Dietzen

  • Lifeline
    8.1/10347 votes

    #3 - Lifeline

    Season 21 Episode 3 - Aired 2/26/2024

    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

  • Left Unsaid
    7.7/10317 votes

    #4 - Left Unsaid

    Season 21 Episode 4 - Aired 3/4/2024

    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

  • The Plan
    8.0/10312 votes

    #5 - The Plan

    Season 21 Episode 5 - Aired 3/25/2024

    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.

    Director: Lionel Coleman

    Writer: Katherine Beattie, Chad Gomez Creasey

  • Strange Invaders
    7.7/10307 votes

    #6 - Strange Invaders

    Season 21 Episode 6 - Aired 4/1/2024

    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

    Writer: Steven D. Binder, Gina Gold, Aurorae Khoo

  • A Thousand Yards
    8.9/10454 votes

    #7 - A Thousand Yards

    Season 21 Episode 7 - Aired 4/15/2024

    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.

    Director: Diana Valentine

    Writer: Christopher J. Waild

  • Heartless
    8.1/10283 votes

    #8 - Heartless

    Season 21 Episode 8 - Aired 4/22/2024

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

    Director: Michael Zinberg

    Writer: Sydney Mitchel

  • Prime Cut
    7.2/10281 votes

    #9 - Prime Cut

    Season 21 Episode 9 - Aired 4/29/2024

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

    Director: Diana Valentine

    Writer: Marco Schnabel, Chad Gomez Creasey

  • Reef Madness
    7.7/10277 votes

    #10 - Reef Madness

    Season 21 Episode 10 - Aired 5/6/2024

    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.

    Director: José Clemente Hernandez

    Writer: Scott Williams