NCIS Season 18 Episodes

Mark Harmon is returning

Is Mark Harmon returning to NCIS as Gibbs? Here’s what we know

Good news for NCIS fans! Mark Harmon will reprise his iconic Leroy Jethro Gibbs role in the flagship series. His return will be featured in a special (and first-ever) crossover event between NCIS: Origins Season 2 and the flagship series, which is well into its twenty-third season.

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Mark Harmon to make rare 'NCIS: Origins' appearance and Gibbs is 'no longer alone'

E! News on MSN · 2d

Mark Harmon Returning to NCIS: Origins 4 Years After Franchise Exit

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Mark Harmon Sets ‘NCIS’-Verse Return With ‘Origins’ Guest Spot

Mark Harmon is making an on-screen return to the NCIS universe.

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Mark Harmon revives role of Gibbs in rare 'NCIS: Origins' appearance

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Mark Harmon Reprises His Role as Gibbs in the ‘NCIS: Origins’ and ‘NCIS’ Crossover Special

NCIS: Origins Season 2 Episode 3 Honors Ducky Mallard with a Beautiful Tribute — and It’s Pure Perfection

Origins would deliver its own tribute to fan-favorite Donald “Ducky” Mallard, it was hard to know what to expect from this venture or whether Adam Campbell could reprise the role in a way that aligned with this spinoff.

NCIS: Origins: Young Ducky Teams Up With 'Jethro' — But What Are His Real Motives? Watch Exclusive Sneak Peek

Campbell previously guest-starred in four episodes of "NCIS" as Young Ducky. His first appearance came in Season 12, Episode 3 ("So It Goes"), while his most recent encore came in Season 18, Episode 2 ("Everything Starts Somewhere"), which predated McCallum's death by three years.

‘NCIS’ star makes surprise return to series after 4 years

Harmon will return in the flesh for a special crossover event on Tuesday, Nov. 11. For one night only, “NCIS” and “NCIS: Origins” are swapping time slots; the spinoff will air first at 8 p.m. ET, followed by the original series.

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NCIS: Origins Is Bringing In Young Ducky For Season 2, And I’m Loving How It'll 'Honor The Memory' Of David McCallum

As long as NCIS: Origins is airing, there’s going to be fans asking when younger versions of characters from the original NCIS are going to appear. Well, now we finally have one locked in for the prequel’s second season with a little less than two ...

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Meet the Real-Life Partners of the “NCIS” Cast (Including the Couple Who Just Welcomed Their Second Child!)

In July 2025, Wilmer Valderrama and his fiancée, Amanda Pacheco, announced the arrival of their son, Wolf Monte