One thing that NCIS: Origins has been excellent at accomplishing is staying true to the history of Leroy Jethro Gibbs’ past, ...

"NCIS" legend Mark Harmon is to guest star as his character, Leroy Jethro Gibbs, on the prequel, "NCIS: Origins," next month.

Adam Campbell ’s return to the NCIS universe as young Donald “Ducky” Mallard on NCIS: Origins will pay homage to the OG ...

But arguably the biggest reveal came with learning why Ducky talks to bodies, which we saw the late David McCallum did when ...

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

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

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

Harmon, 74, will make a rare guest appearance on "Origins" as Gibbs, the character he played for 18 "NCIS" seasons, during ...

"NCIS: Origins" will catch up with present-day Leroy Jethro Gibbs as part of its big crossover with the flagship series in ...

In the first look at Harmon’s return, his present-day version of Gibbs is seen pouring himself a drink. This marks a rare ...

Adam Campbell felt anxious while stepping into David McCallum’s iconic role as Ducky in the episode that pays tribute to the ...