Mark Harmon will make a full-time return to the 'NCIS'-verse, reprising his role as Leroy Jethro Gibbs in the 2026-27 season.

The actor will return to the CBS franchise.

Origins for a season-long arc. Harmon, who previously starred as Leroy Jethro Gibbs for 18 seasons on NCIS, will appear in ...

Mark Harmon’s back as Leroy Jethro Gibbs in all episodes of the upcoming third season of CBS’s NCIS: Origins. According to ...

The long-time franchise lead also narrates the prequel series and is an executive producer.

After a shocking exit from NCIS, Mark Harmon is returning to the prequel — and will be appearing in all episodes in season 3.

NCIS is all set to arrive in the fall of 2026, and while you wait for the next chapters of the acclaimed shows, make sure to ...

S02E05: "Funny How Time Slips Away" finds younger Gibbs (Austin Stowell) and the team investigating the small-town death of a naval officer in the '90s – a case that's unexpectedly reopened in the ...

Mark Harmon may have left NCIS, but he'll forever be synonymous with Supervisory Special Agent Leroy Jethro Gibbs. Harmon brought Gibbs to life for nearly two decades. The character first appeared on ...

Mark Harmon last appeared as the character in a November 2025 episode of the prequel series ...