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Mark Harmon's Gibbs Returns for Full NCIS: Origins Season 3
30 Jun
Summary
- Mark Harmon will return as Leroy Jethro Gibbs for all episodes.
- Season 3 will feature a present-day mystery tied to his past.
- NCIS: Origins follows a young Gibbs in the early '90s.

Mark Harmon is set to reprise his role as Leroy Jethro Gibbs across all episodes of NCIS: Origins season 3. The executive producer and narrator, who has been with the spinoff since its 2024 debut, will be featured in a season-long, action-packed storyline. This narrative will explore a present-day mystery linked to Gibbs' time in the '90s at Camp Pendleton.
The prequel series, NCIS: Origins, focuses on a younger Leroy Jethro Gibbs, portrayed by Austin Stowell, during the early 1990s. Harmon, who originated the character on NCIS for 18 seasons before his departure in 2021, has made prior appearances in the spinoff. His return for the entirety of season 3 promises to deepen the understanding of the character's past and present.
The third season of NCIS: Origins is scheduled to premiere in the fall on CBS, airing Tuesdays at 10 p.m. ET/PT. It will also be available for streaming on Paramount+.