“NCIS” fans will be 'pissed off' to learn Mark Harmon doesn't know this about his character Gibbs, “Origins” co-creator says

David J. North jokes to EW that Harmon's slip on the set of the recent "NCIS" crossover is "gonna destroy some fans' hearts." ...

Mark Harmon Returns to “NCIS” Franchise with Callback to His 'Early Days' in Rare Cameo

Mark Harmon reprised his role as the beloved special agent on Tuesday, Nov. 11 during a NCIS crossover event that spanned ...