Mark Harmon Set to Reprise Gibbs Role in NCIS: Origins Season 3
WHO:
US Magazine - Mark Harmon, 74, will reprise the role of present-day Leroy Jethro Gibbs.
Deadline - Eric Christian Olsen will serve as an executive producer on the upcoming third season of NCIS: Origins under his banner Cloud Nine Productions.
Collider - Mark Harmon will reprise his role as Leroy Gibbs.
Deadline - Harmon previously starred as Leroy Jethro Gibbs for 18 seasons on NCIS.
WHAT:
Coming Soon - The prequel series, NCIS: Origins, started in 2024.
Collider - Harmon will officially reprise his role in NCIS: Origins, not just as a voice-over role.
Screen Rant - Harmon confirms his on-screen return with a new season-long story arc for Gibbs.
Deadline - Harmon will appear in all episodes of Season 3 as part of a present-day mystery tied to his ‘90s Camp Pendleton days.
Variety - Harmon will play the iconic character in a season-long arc of the upcoming third season of NCIS: Origins.
WHERE:
Deadline - The mystery is tied to Camp Pendleton.
WHEN:
US Magazine - CBS confirmed on Tuesday, June 30, that Harmon will appear in all episodes in the upcoming season.
Collider - The new season of NCIS: Origins is set to air this fall.
Screen Rant - The new season is scheduled for later this year.
Variety - The third season of NCIS: Origins is upcoming.
HOW:
Deadline - Olsen has joined the prequel series' original executive producers David J. North and others.
Deadline - Harmon will appear in a season-long arc, indicating a structured narrative throughout the season.
(UPDATED July 1, 2026 01:43 UTC)
Mark Harmon, at 74 years old, is set to reprise his iconic role as present-day Leroy Jethro Gibbs. CBS confirmed that he will appear in all episodes of the upcoming season, which is set to premiere on September 25, 2026. Fans of the series can look forward to seeing Harmon back in action as Gibbs once again.
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(UPDATED June 30, 2026 23:20 UTC)
Eric Christian Olsen will serve as an executive producer on the upcoming third season of the prequel series NCIS: Origins, which began airing in 2024, under his banner Cloud Nine Productions. He joins the original executive producers, including David J. North, to continue developing the series. Fans can look forward to more updates as production progresses.
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(UPDATED June 30, 2026 19:41 UTC)
Mark Harmon will reprise his iconic role as Leroy Gibbs in the upcoming third season of NCIS: Origins, marking his return to the character after 18 seasons on NCIS. This time, Harmon will not just lend his voice but will be featured on-screen throughout the entire season, which will revolve around a present-day mystery connected to his past at Camp Pendleton. The new season is set to air this fall, promising an engaging season-long story arc for fans of the series.