The 'LA' star is now an exec producer on the prequel.

Mark Harmon is coming back as Gibbs through all of Season 3 of "NCIS: Origins." How will that work? "You'll see," Harmon says ...

NCIS: Origins has set Mark Harmon to return as Special Agent Leroy Jethro Gibbs for season three.

Mark Harmon is returning to NCIS: Origins for a season-long arc.

"NCIS: Origins" is bringing Mark Harmon back in front of the camera for a big Season 3 mystery. The actor and executive ...

NCIS: Los Angeles' alum Eric Christian Olsen is returning to the 'NCIS' franchise, joins 'Origins' as executive producer.

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

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.

Michael Weatherly’s return as Tony DiNozzo marks another major legacy move for NCIS and could reshape Season 24.

ORIGINS brought Gibbs’ world back into focus, one NCIS writer tried to save a beloved mentor from a brutal exit.