Before 'NCIS,' Young Mark Harmon Starred in Military Thriller 'The Presidio' - MSN

Is Mark Harmon On NCIS: Origins? - Game Rant

The Real Reason Mark Harmon's Gibbs Doesn't Lock His Front Door In NCIS - SlashFilm

We Wouldn't Have 'NCIS' as We Know It Without This Iconic Political Drama - MovieWeb

MARK HARMON Obituary (2025) - New York, NY - New York Times - Legacy.com

Why Was Gibbs Replaced on NCIS? - Game Rant

“I was just tired”: The Brutal NCIS Schedule That Made Mark Harmon Work for 22 Hours in the First Day Definitely Played a Part in His Decision to Quit - IMDb

“I said, ‘No'”: Mark Harmon Kicked the Bucket on a Potential Multi-Million Dollar NCIS Deal to Stay True to the Show - IMDb

Michigan Woman Believed She Was Loaning Actor Mark Harmon 475K - 97.9 WGRD

Mark Harmon makes prophetic bet with Waldorf Astoria Texas Hill Country - HOTELSMag.com

For Mark Harmon, Waldorf Astoria Texas Hill Country is not a reclamation project, it's something prophetic - HOTELS

'NCIS': Mark Harmon's Life & Career In Pictures - MSN

Why Mark Harmon's Gibbs Didn't Appear In NCIS Season 21's Ducky Tribute Episode - SlashFilm

NCIS' Mark Harmon lands new role in 'comfortable' reunion with ex co-star - MSN

NCIS' Mark Harmon lands new role in 'comfortable' reunion with ex co-star - Irish Star