There was a time when it seemed impossible for NCIS to keep going without Mark Harmon leading the charge as Leroy Jethro ...

Mark Harmon's first acting gig was at the discretion of his famous father who already had a stronghold in the industry. While ...

A fter Mark Harmon left NCIS at the beginning of Season 19, the actor finally returned to the franchise for the prequel ...

Except, of course, he did help cast it. Related: Mark Harmon on Why Austin Stowell Is the Perfect Young Leroy Jethro Gibbs ...

Before warming up to her inclusion, Mark Harmon was initially doubtful about the addition of one character as a replacement ...

Despite leaving the show to tackle a fresh challenge, Mark Harmon is apparently not against the idea of returning to the main ...

Mark Harmon may not have much of an acting role in NCIS: ORIGINS, but he is still very much involved.

Kyle Schmid exclusively opened up to Us about playing Mike Franks on ‘NCIS: Origins,’ which premiered in October ...

He revealed that although the experience "changed [his] direction," it was still "humiliating" for his teenage self Mark ...

Mark Harmon has come a very long way from his very first acting jobs. The former NCIS star has been in the business since the early 1970s, and aside from his role as Special Agent Leroy Jethro ...

Twisters' star Glen Powell said roles on shows like 'NCIS' 'would keep me afloat for a year' early in his career.