Mark Harmon, who played the 'NCIS' lead Leroy Jethro Gibbs for 18 years, is returning for an appearance on ‘NCIS: Origins’ ...

F or nearly two decades, Leroy Jethro Gibbs served as the main protagonist on NCIS, and now the character will soon be taking ...

According to TVLine and Deadline, NCIS: Origins co-showrunner David J. North revealed during a panel discussion with ...

While it was previously announced that Harmon would return as older Gibbs to narrate the series, NCIS: Origins co-showrunner ...

Mark Harmon is finally confirmed to return as Leroy Jethro Gibbs more than three years after his last appearance as the ...

Even though Harmon will only serve as his character's narrator, he will actually be making a brief appearance in the two-hour ...

Here's everything you need to know about who plays Young Gibbs on the NCIS: Origins cast. The new NCIS spin-off debuts soon.

Mark Harmon once discussed the likelihood of appearing in a hypothetical series finale for the long-running ‘NCIS’.

Old and new faces are reporting for duty in new images for NCIS: Origins. Check out the latest looks at the series premiere.

The actor says the young Gibbs-led prequel provides a "more raw look at these characters" and "gets much more personal" than ...