NCIS season 23 officially brought back Leroy Jethro Gibbs back. While it was largely a surprise, his homecoming was actually set up in 2019.

Mark Harmon is going to be in every episode of the prequel's third season.

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

Mark Harmon’s Leroy Jethro Gibbs is returning on-screen for every episode of NCIS: ORIGINS Season 3, but his Alaska chapter ...

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

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

After a shocking exit from NCIS, Mark Harmon is returning to the prequel — and will be appearing in all episodes in season 3. CBS confirmed on Tuesday, June 30, that Harmon, 74, will reprise the role ...

NCIS legend Mark Harmon is returning to the franchise five years after his exit from the long-running show. The actor is all ...

NCIS has been on the air since 2003 — and the fan favorite drama is still going strong. The CBS series follows a group of ...

For 18 seasons (and four season 19 episodes), Mark Harmon starred as former U.S. Marine Corps scout sniper–turned–special agent Leroy Jethro Gibbs. "What has always drawn me here is the character I ...

Mark Harmon will play Jethro Leroy Gibbs in a season-long arc of the upcoming third season of prequel series "NCIS: Origins." ...