In 2014, Adam Campbell guest starred in the NCIS Season 12 episode “So It Goes” as Donald “Ducky” Mallard in his younger years. He reprised the character originated by the late David McCallum three ...

CBS announced that Mark Harmon will reprise his role as Leroy Jethro Gibbs in an upcoming guest appearance on 'NCIS' and ...

Get the latest news about Sean Murray. Find exclusive interviews, video clips, photos and more on Entertainment Tonight.

This article was originally published on precincttv.com as The NCIS crossover event will include a rare appearance from an OG ...

Mark Harmon is making a comeback to the NCIS franchise. CBS announced that the actor will return as Leroy Jethro Gibbs for the upcoming crossover event between NCIS and NCIS: Origins. Harmon starred ...

Fans will finally be able to see Mark Harmon's grand return to the part of Leroy Jethro Gibbs in an ambitious crossover ...

Mark Harmon is making an on-screen return to the NCIS universe. Harmon will guest star in an episode of NCIS: Origins on Nov.

Mark Harmon, who spent 18 seasons on "NCIS," is reprising his role as special agent Leroy Jethro Gibbs for a crossover event.

Harmon will return in the flesh for a special crossover event on Tuesday, Nov. 11. For one night only, “NCIS” and “NCIS: ...

Warning: SPOILERS for the NCIS: Sydney episode “Lost in Translation” are ahead!

Mark Harmon will reprise his iconic Leroy Jethro Gibbs role in the flagship series. His return will be featured in a special (and first-ever) crossover event between NCIS: Origins Season 2 and the ...

NCIS' star Mark Harmon is reprising the role of Leroy Jethro Gibbs in an upcoming Veteran's day crossover episode of 'NCIS: ...