What Mark Harmon is doing now after NCIS has been a subject of discussion among his fans. Read on to discover his new projects since leaving NCIS.

Mark Harmon continues his collaboration with former special agent Leon Carroll Jr. in their groundbreaking NCIS book series!

'Ghosts of Sicily' hits shelves on April 14 ...

The prequel follows Gibbs' early days at NIS.

Mark Harmon may have left NCIS, but he'll forever be synonymous with Supervisory Special Agent Leroy Jethro Gibbs. "Mark's always been part of the show, Mark's always going to be part of the show," ...

Fans of the CBS drama got a sneak preview of Mark stepping back into Gibbs' shoes on Instagram. Mark spoke about whether he plans to return to the NCIS franchise in a full-time capacity. We're moments ...

(CBS) - Mark Harmon will make a special guest appearance as Leroy Jethro Gibbs on NCIS: Origins on Nov. 11. Harmon played Gibbs for 18 seasons on NCIS. In the crossover event airing on Veterans Day, ...

Bestselling Authors Mark Harmon and Leon Carroll, Jr. Return to Release Third Installment, Ghosts of Sicily, from Harper Select on April 14, 2026 From the New York Times bestselling authors and NCIS ...

Ahead of the "NCIS" and "NCIS: Origins" crossover event on Nov. 11, 2025, fans had one question in mind: Would Mark Harmon's Gibbs share a scene with present-day Lala? Heading into the episode, all we ...