While it was previously announced that Harmon would return as older Gibbs to narrate the series, NCIS: Origins co-showrunner David J North has now confirmed that he will also make a brief appearance in the pilot episode.

As already mentioned, we’ve known that Harmon’s voice will be present throughout NCIS: Origins since the older Gibbs will be recounting his early time working for the title law enforcement agency, known back then as NIS.

It’s not supposed to be about old Leroy Gibbs — this is about his younger self coming up in the Naval Criminal Investigative Service — but Mark Harmon will appear briefly in the premiere episode of NCIS: Origins.

There have been a lot of questions about whether Mark Harmon would ever return to NCIS. Well, we finally have a positive answer to the question. Harmon played Gibbs in the flagship series from the beginning.

Mark Harmon is set to make his first onscreen appearance as NCIS fan-favorite character Leroy Jethro Gibbs in three years.

In a surprising turn of events, Mark Harmon will reprise his iconic role as Jethro Gibbs in NCIS: Origins after his last portrayal in 2021.