After almost 20 seasons, Leroy Jethro Gibbs left NCIS. Mark Harmon may have left the show, but this isn't the end for Gibbs.

Mark Harmon discusses leaving his 'NCIS' role as Gibbs, new book 'Ghosts of Panama,' producing 'NCIS: Origins' and returning for 'Freaky Friday 2.

After leaving NCIS, Mark Harmon went from actor to author when he decided to write a book. But initially, there was hope that Harmon would continue his connection to NCIS by doing a literary piece ...

Mark Harmon holds Jethro Gibbs close to his heart. After 18 years of playing the special agent on “NCIS,” Harmon exited the show as a series regular in 2021 but remained a series regular ...

Mark Harmon talks about his narrator and executive producer role on "NCIS: Origins" and what he thinks of the new Gibbs, Austin Stowell.

Mark Harmon is sharing behind-the-scenes secrets about his time on NCIS and how he may not have starred in it if things -- including his character's name -- had been slightly different. Harmon, 72 ...

Mark Harmon has been a successful actor for decades with a career dating to the early '70s and a 19-year stint on the massively popular show "NCIS." The TV star spoke to Fox News Digital about the ...

'NCIS' star Mark Harmon's departure after 18 seasons not only devastated viewers, but also his castmates who are still hell-bent on his return, RadarOnline.com has learned.

In a fun twist, Mark Harmon's book about the real-life predecessor to NCIS getting a November release means that it will hit shelves almost exactly twenty years after NCIS premiered in fall of 2003.