Welcome back to Pendleton, Dr. Donald Mallard (Adam Campbell)! Ducky returns to NCIS: Origins in the Tuesday, March 31, episode, and while it’s good to see him again, the circumstances around his ...

Fans were disappointed that Mark Harmon didn't appear as Gibbs in the "NCIS" Ducky tribute episode. But there was a simple explanation for his absence.

Gibbs (Austin Stowell) got a visit from an old and future friend in the latest NCIS: Origins episode, with Adam Campbell reprising his role as the young Dr. Donald “Ducky” Mallard from the mothership.

Austin Stowell as Leroy Jethro Gibbs, Kyle Schmid as Mike Franks, Adam Campbell as Doctor Donald “Ducky” Mallard — 'NCIS: Origins' Season 2 Episode 13 "Homeward Bound" - Greg Gayne/CBS The ME is ...

Gibbs had plenty of rules during his time on NCIS, but only one of them is Mark Harmon's favorite — find out which rule he ...

Mark Harmon's Leroy Jethro Gibbs leads a team investigating various military-related crimes. When it debuted, that team ...

David McCallum was a major part of "NCIS," but another big name was pitched to play the role of Ducky when the crime drama was in development.