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Mark Harmon Returns as Gibbs in NCIS: Origins Crossover

Andre Martin | Last Updated : October 29, 2025

Fans of the long-running naval crime procedural NCIS are in for a special treat this Veterans Day, as the iconic star Mark Harmon is set to make an on-screen return as Leroy Jethro Gibbs. While Harmon has been lending his voice as the narrator for the prequel series NCIS: Origins, the upcoming crossover event on November 11th will mark his first physical appearance since the prequel’s 2024 pilot, creating significant anticipation among the show’s dedicated viewership.

Mark Harmon’s Return as Gibbs in ‘NCIS: Origins’

Mark Harmon, who portrayed the stoic and principled Special Agent Leroy Jethro Gibbs for 18 seasons on the flagship series NCIS, is confirmed to reprise his beloved role. This return is scheduled as part of a special Veterans Day crossover event, seamlessly blending the narratives of NCIS: Origins and the main NCIS series. Harmon’s voice has been a constant presence in NCIS: Origins, guiding viewers through the early years of his character, but this will be a moment for fans to see Gibbs in a live-action capacity once again.

The Veterans Day Crossover Event Details

The highly anticipated crossover event is slated to air on November 11th, a fitting date given the show’s military themes. The evening will commence with an episode of NCIS: Origins at 8 p.m., followed by a new installment of NCIS at 9 p.m. The official description for the event reveals a compelling plotline: “younger Gibbs (Austin Stowell) and team investigate the small-town death of a naval officer in the ‘90s — a case that’s unexpectedly re-opened in the present day.” This setup promises to weave together past and present investigations, highlighting the enduring impact of cases and the evolution of Gibbs’ character.

Insights from the Showrunners and Harmon

Co-showrunners David J. North and Gina Lucita Monreal expressed their excitement about Harmon’s return. They acknowledged the fans’ longing for Gibbs, stating, “Four years ago, Gibbs disappeared to Alaska to live a life of solitude. We know how much fans have missed seeing Mark and have wondered what Gibbs is up to today.” They further teased, “Well, on Nov. 11, we’re so excited to announce that Mark Harmon will return as Leroy Jethro Gibbs in the ‘Origins’ hour of the ‘NCIS’ crossover event. We don’t want to give too much away, but let’s just say Gibbs is no longer alone.”

Mark Harmon himself shared his positive outlook on revisiting the character. He commended North and Monreal’s storytelling on Origins, noting their ability to “push boundaries and dive deeper into the characters’ backstories.” Harmon revealed that they approached him with “an idea for Gibbs that I liked, and it seemed like a good time to check in with him.” This suggests a carefully crafted narrative that respects the character’s established journey while offering new developments.

Exploring Young Gibbs and the ‘Origins’ Narrative

NCIS: Origins delves into the formative years of Leroy Jethro Gibbs in the early 1990s, showcasing his evolution as a special agent. The currently airing second season follows the NCIS Camp Pendleton team, led by Mike Franks (Kyle Schmid), providing context for Gibbs’ early career and the experiences that shaped the formidable agent fans know. Austin Stowell portrays the younger Gibbs, offering a fresh perspective on the character’s development and relationships within the NCIS framework. The crossover event will leverage this dual timeline, connecting a case from young Gibbs’ past to a present-day investigation, enriching the overall mythology of the NCIS universe.

Conclusion

The Veterans Day crossover event, featuring Mark Harmon’s on-screen return as Leroy Jethro Gibbs in NCIS: Origins, is poised to be a significant moment for the franchise. It not only brings back a beloved character in a new capacity but also deepens the narrative connections between the prequel and the flagship series. Fans can look forward to a compelling blend of past and present investigations, offering fresh insights into Gibbs’ enduring legacy and the early days of NCIS.

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