Few TV franchises have built a fanbase as loyal as NCIS. And of all its characters, one stands above the rest: Leroy Jethro Gibbs, the tough-but-tender special agent who became the emotional heart of the show for millions of viewers around the world.
Now there's news that longtime fans have been quietly hoping for. Mark Harmon is returning to the NCIS universe — and this time, he won't just be the voice guiding the story. He's stepping back into the spotlight as a full-fledged character.
According to The Hollywood Reporter, Harmon will appear in every episode of NCIS: Origins season 3 during the 2026–2027 television season. He'll once again play Gibbs, while continuing to serve as the show's narrator and one of its executive producers.
Mark Harmon and Gibbs are getting a brand-new chapter
For years, Mark Harmon's name was practically synonymous with NCIS. He played special agent Leroy Jethro Gibbs for more than 18 seasons, turning a strict, rule-driven leader into one of the most beloved characters on television — someone who was hard on the outside but deeply empathetic underneath.
Harmon stepped away from the main series in 2021. But the prequel, NCIS: Origins, opened the door to something fans had always wanted: a real look into Gibbs' past.
Mark Harmon was already a star long before Gibbs
Most people know him as the no-nonsense special agent, but Mark Harmon had a thriving film and television career well before NCIS. He appeared in comedies and popular dramas throughout the 1980s and 1990s, building a steady reputation in Hollywood.
Still, it was Leroy Jethro Gibbs who made him a household name — a role that continues to define his career to this day.
NCIS: Origins is taking the story somewhere new
Set in the 1990s, NCIS: Origins takes viewers back to a young Gibbs at the very start of his career, long before he became the legend fans know. Austin Stowell plays the younger version of the character, while Mark Harmon ties everything together through a present-day storyline.
What makes season 3 different is its structure: the entire season will revolve around a single, overarching mystery. The plot connects a modern-day event to Gibbs' time at Camp Pendleton, California, in the 1990s.
That's a meaningful shift for the franchise, which has traditionally relied on self-contained, case-of-the-week investigations. If you love shows built around long, slow-burning mysteries, these real crime stories with unexpected twists are worth a look too.
Over a thousand episodes in, the NCIS universe still has more to say
NCIS has become one of the most successful TV franchises of the past two decades. Across all its spin-offs, the world has produced more than 1,100 episodes, with millions of viewers worldwide following the work of its naval crime investigators.
Now the creators are steering the story in a direction that offers something for everyone — nostalgia for longtime fans, and a fresh entry point for anyone just discovering Gibbs' story.
Mark Harmon is shaping the show's future as a producer too
This return means more than an acting role for Harmon. He's also on board as an executive producer for NCIS: Origins, giving him a real hand in how the story unfolds behind the scenes.
Season 3 will be led by showrunner David J. North, who is working alongside Mark Harmon, Sean Harmon, Michele Greco and Eric Christian Olsen on the production.
A special stretch is coming for Gibbs fans
Mark Harmon's return is genuinely big news for NCIS fans. For years, Gibbs was one of the pillars the entire series was built on. And the new season of NCIS: Origins doesn't just revisit the past — it promises a whole new way of telling the story.
The show's enduring success proves something simple: over time, certain characters become true pop-culture icons. And Gibbs, without a doubt, is one of them.
When does NCIS: Origins season 3 premiere?
According to The Hollywood Reporter, the third season is set to air during the 2026–2027 television season.
Is Mark Harmon actually playing Gibbs again?
Yes. Harmon will appear as Gibbs in every episode of season 3, while also continuing as the show's narrator and one of its executive producers.
Who plays the young Gibbs in NCIS: Origins?
Austin Stowell plays the younger version of Gibbs, set in the 1990s, while Mark Harmon connects to the series through a present-day storyline.
What makes season 3 different from earlier NCIS seasons?
Unlike the franchise's usual case-of-the-week format, season 3 is built around a single mystery that spans the entire season, linking a modern-day event to Gibbs' time at Camp Pendleton.
