5 Essential NCIS Episodes Everyone Should Watch At Least Once

It's no secret that "NCIS" is a tricky show to watch on a time crunch. With over 480 episodes, the long-running CBS crime drama can't simply be binged in an afternoon — and for casual viewers looking for a quick, informative series sampler, it can be difficult to know where to start. But most fans of the show will concur there are a handful of episodes that everyone should see at least once, whether it's your first time seeing the NCIS crew take down bad guys or your 40th.

This list consists of episodes that best encapsulate the most compelling "NCIS" arcs while also spotlighting some of the show's most fundamental characters. No matter what you may already know about "NCIS," clicking play on any of these episodes will leave you with a solid idea of what "NCIS" is about and why its loyal fanbase has stuck with the show for so long. (And you might just walk away with a few new life lessons under your belt.) Here are five "NCIS" episodes that are absolutely necessary watches, for seasoned fans and series newcomers alike.

It might seem like a no-brainer to kick this list off with the show's pilot. Without "Yankee White," we never would have gotten to meet some of the biggest fan favorites of "NCIS" — the stoic yet good-hearted Special Agent Leroy Jethro Gibbs (Mark Harmon), the charismatic Agent Tony DiNozzo (Michael Weatherly), the brilliant and zany forensic scientist Abby Sciuto (Pauley Perrette). It's the first time we ever get to hear one of "Gibbs' rules," and it's also the first time we ever see Gibbs tackle a woodworking project in his basement (an iconic location that would eventually prove host to some of the biggest plot reveals on "NCIS").

But the opening episode of "NCIS" is necessary viewing for more than its many firsts. It's a rollicking 44-minute episode that not only sees the NCIS team tackle one of their biggest known cases — a planned assassination of the president — but also emphasizes all the ways that "NCIS" is more than just a crime drama: First and foremost, it's a story of family. For every shocking murder and stolen machine gun, "Yankee White" equally takes time to develop the compelling father-son dynamic between Gibbs and DiNozzo and to establish the mentor-mentee relationship between Gibbs and Agent Caitlin "Kate" Todd (Sasha Alexander).

No other episode on this list could exist without the foundation offered by "Yankee White" — and for new viewers looking to understand why "NCIS" stands out from so many of its fellow cop dramas, it's the perfect explanation.

The slow-burn reveal of Gibbs' backstory is one of the most prominent arcs on "NCIS," and "Requiem" remains one of this plotline's most impactful entries. When the childhood friend of Gibbs' late daughter finds herself in a precarious situation with a Marine sergeant, she goes to Gibbs for help, forcing the NCIS special agent to confront a swarm of long-buried memories. After it becomes clear that the young woman's life is in danger, Gibbs takes on a heartbreaking mission: to save this woman in the way that he never got to save his own daughter.

Until this point in the series, we got only brief hints at Gibbs' relationship with his deceased wife and child. But through a series of crucial flashbacks, "Requiem" offers "NCIS" viewers their first in-depth exploration of Gibbs' past, making it one of the key episodes to understanding the mysterious ex-Marine at the heart of the series. (Thanks to an impressive underwater rescue made by Agent DiNozzo, it was also Michael Weatherly's favorite-ever episode to film, as he said on TikTok.) "Requiem" is essential "NCIS" viewing because it showcases the series' willingness to transcend its police procedural format. When necessary, it can also hold its own as an effective study of grief.

From time jumps to truth serums to some of the greatest "Tiva" moments in "NCIS" history, this whirlwind episode has it all. When the NCIS team connects the recent disappearance of Agent Ziva David to a Somali-based terrorist unit, they set out to avenge their friend and to complete her unfinished mission — but things get complicated when Agent DiNozzo is captured and injected with truth serum. As DiNozzo forcibly recounts the specifics of the NCIS agency to his captors, he also elaborates on the strong bonds between the members of his team, building to a heart-pounding climax that reveals just what happens to people who mess with the "NCIS" family. 

While "Truth or Consequences" stands out as one of the most intricately plotted episodes on "NCIS" — it somehow manages to pack its rip-roaring tale of romance, international intrigue, and thwarted terrorist plots into 43 minutes – the "NCIS" Season 7 premiere is perhaps most notable for what it accomplishes with its characters. Almost every core "NCIS" character gets a chance to shine and contribute to Ziva's rescue, resulting in some of the series' most emotional and memorable moments to date. Throughout the NCIS team's epic quest to rescue one of their own, viewers are reminded again and again of why we choose to reunite with these characters every week: They're brave, they're good at what they do, and, most importantly, they love one another.

This is the show's 200th episode for a reason. "Life Before His Eyes" kicks off when an unknown assailant pulls a gun on Gibbs at his local diner, thrusting the ex-Marine into a strange limbo that unites him with the faces of his past and forces him to contemplate his present. It's a unique "Christmas Carol"-esque episode that charts experimental territory for "NCIS" while also never losing itself in its own gimmick, exploring fascinating alternate realities in the "NCIS" universe (what if Kate were still alive? What if Gibbs had never avenged the deaths of his wife and daughter?) at the same time that it seriously explores how even the smallest of choices can change your life.

"Life Before His Eyes" uses its landmark episode status as an opportunity to look back at all the many characters and story arcs that shaped "NCIS" up until that point, reminding audiences of all the factors that went into making the show great. In bringing back fan favorites like Mike Franks (Muse Watson) and even Caitlin Todd, "Life Before His Eyes" acts as a heartfelt thank-you to the people who have been with the CBS crime drama from the beginning. But like all the best "NCIS" episodes, it also devotes time to telling a fundamentally human story. It's a touching homage not just to the character of Leroy Jethro Gibbs, but to "NCIS" as a whole.

This episode changed "NCIS" forever. For over 20 years, "NCIS" has prided itself on its ability to shock viewers with plot twists that nobody — not even the most dedicated crime drama fans — could have seen coming. But the show would never have built this reputation without "Twilight" and the shocking murder of Agent Caitlin Todd, which rattled viewers and lent "NCIS" its first palpable uptick in ratings. 

This episode is essential "NCIS" viewing because the shock of Kate's loss doesn't simply end when the "Twilight" credits roll. The aftereffects of Kate's death ripple throughout "NCIS" for years to come, lingering with characters and affecting the choices they make long after she is gone. So much of "NCIS" centers around how the events of our past influence the actions of our present, and "Twilight" evolves to become the primary framework for how many "NCIS" characters understand and communicate that theme.

For that reason alone, "Twilight" is just as fundamental to the "NCIS" franchise in the year 2026 as it was in the year 2005. But the historic Season 2 finale also serves as undeniable proof of what "NCIS" was and has always been: one of the boldest, most thoughtful crime dramas on network television.