After nearly 23 years of solving crimes, surviving cast shakeups, and captivating millions of viewers, NCIS has reached a milestone few television shows ever touch: its 500th episode. The landmark installment, fittingly titled "All Good Things," aired on March 24, 2026, at 8 p.m. ET/PT on CBS, drawing longtime fans and newcomers alike into a story packed with nostalgia, drama, and a seismic shift for the beloved procedural.
Since premiering as a spin-off of JAG back in September 2003, NCIS has become a staple of American primetime, expanding into a sprawling franchise with six spin-offs and a legacy of memorable characters. The flagship series, created by Donald P. Bellisario and shepherded through the years by a cadre of showrunners including Steven D. Binder, has weathered cast departures, shifting television landscapes, and even the retirement of its original lead, Leroy Jethro Gibbs, played by Mark Harmon. Yet, as Collider notes, the show has remained a "beloved mainstay of the network across multiple decades at this point."
The 500th episode is more than just a number—it's a celebration of the show's resilience and the loyalty of its fan base. According to ScreenRant, the episode is "a major milestone for the procedural, and it changes the course of its future." The plot pulls together threads from the show's rich past, centering on a case involving Billy Fuentes, the son of a Marine that Gibbs once helped in the very second episode of the series. Now, with NCIS officially disbanded and the team scattered, the agents must reunite "off the books" to help Fuentes' sister, who stands accused of murder.
But operating without badges—and without the support of a functioning agency—proves more dangerous than ever. As the team seeks justice, they quickly learn that "the cost may be even greater than their careers," as Collider puts it. The stakes are raised further when CID Agent Thompson, played by Matt Cook (known for Man with a Plan and Clipped), is murdered, and the disbanded NCIS team emerges as suspects in the case. Adhir Kalyan, recognized from United States of Al, also guest stars as a character who comes to arrest Director Leon Vance, adding another layer of intrigue to the already tense proceedings.
The episode, written by showrunner Steven D. Binder and directed by José Clemente Hernandez, is rich with callbacks and Easter eggs for dedicated fans. Emily Wickersham returns as Ellie Bishop, now cast in a surprising role as a cyberterrorist and the team's next target—a twist that Wickersham herself described as a "fire that she didn't want to put out." There are also references to franchise icons like Gibbs and Abby, and a flashback package that honors the show's storied history.
Yet, for all its nods to the past, "All Good Things" is also a turning point for the series. In a shocking twist, Leon Vance—played by Rocky Carroll, who has been part of the main cast since 2008—meets his end during the investigation. The revelation of Vance's death is handled with a deft emotional touch: in his final moments, Vance is guided into the afterlife by a younger version of Ducky, portrayed by Adam Campbell. This scene, as described by ScreenRant, is "the best character send-off that the show has done in years—arguably even better than Gibbs' exit."
For Carroll, the episode serves as a send-off after years of steady leadership on screen. The loss of Vance leaves a significant void in the agency and the show. As ScreenRant observes, "For nearly two decades, he was the fair protector of NCIS—firm and principled, but always supportive of his team. He ushered in the show's transition from Gibbs to Parker. Whoever ends up occupying his office will have massive shoes to fill."
Despite the heartbreak, the episode is not without hope. The final scenes confirm that, although the agency had been officially shut down, NCIS will be back in operation. The network has already announced a 24th season for fall 2026, ensuring that the saga will continue. The question of who will lead the team looms large, with Timothy McGee, played by Sean Murray—the only remaining original cast member—emerging as the most likely successor. As ScreenRant points out, "It's the easiest path, considering how capable Sean Murray's character has been. While there's no doubt that he will be great in the role, Vance will be sorely missed."
The cast heading into the 500th episode reflects both continuity and change. Alongside Murray, the main roster includes Wilmer Valderrama, Brian Dietzen, Diona Reasonover, Katrina Law, Rocky Carroll (in his final appearance), and Gary Cole. The chemistry among these actors, as well as the organic development of relationships—like the fan-favorite romance between Anthony DiNozzo (Michael Weatherly) and Ziva David (Cote de Pablo)—has been a key ingredient in the show's enduring appeal. Showrunner Steven D. Binder reflected on this in Collider's retrospective, saying, "As it turns out, that was the recipe for the audiences really wanting these two to get together. And I think when it's organic like that, that's where you get the most interesting relationships."
Guest stars have always been a part of the show's DNA, and the 500th episode is no exception. Beyond Cook and Kalyan, the surprise cameo from Adam Campbell as young Ducky is a highlight, providing emotional closure for both Vance and the audience. The episode also weaves in footage of former stars, paying tribute to the legacy of characters like Gibbs and Abby, and reminding viewers of the deep bench of talent that has passed through the series.
For fans, the 500th episode is both a celebration and a moment of transition. It honors the past with reverence, delivers a gut-punch of a twist, and sets the stage for a new era. As the team faces the future without Vance, and as McGee stands poised to step into the leadership role, one thing is clear: NCIS remains a force in television, capable of reinventing itself while staying true to its core. With season 24 already on the horizon, viewers can rest assured that the adventures—and the legacy—of the Naval Criminal Investigative Service are far from over.