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 ...

Mark Harmon will reprise his "NCIS" role of Leroy Jethro Gibbs this week, a return that the TV legend said brought him back to the "tough" early days of the CBS franchise. Tuesday's crossover event ...

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," ...

Four years after leaving the “NCIS” franchise, Mark Harmon is reprising his role as Leroy Jethro Gibbs on an upcoming episode of “NCIS: Origins.” Harmon provides narration for “NCIS: Origins,” which ...

Well, this is certainly going to make the NCIS and NCIS: Origins crossover even more special: Mark Harmon is reprising his role as Leroy Jethro Gibbs in the first hour. CBS announced the news of ...

(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, ...

Oct. 28 (UPI) --NCIS legend Mark Harmon is to guest star as his character, Leroy Jethro Gibbs, on the prequel, NCIS: Origins, next month. Harmon is heard narrating the 1990s spin-off, which is now in ...