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

The NCIS-verse has expanded, and Mark Harmon is still along for the ride. CBS announced in January that a sixth spinoff ...

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

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

It’s not supposed to be about old Leroy Gibbs — this is about his younger self coming up in the Naval Criminal Investigative ...

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

Sean Harmon opened up about how he came up with the concept of ‘NCIS: Origins’ not too long ago, which he’ll be producing.

Why is NCIS still going strong after 21 years? We have a few ideas. Find out if we've captured what makes show special.

NCIS: Origins is all set to hit the screens as a prequel to the twenty-one seasons long series, NCIS. The original series and the prequel series both belong to the NCIS franchise.

It will also help us better understand the hard-ass Marine agent played by Mark Harmon in the original NCIS ... but now we’re pumped to see what secrets still remain! NCIS: Origins will have a shorter ...