Even after his departure from the series in Season 19, Mark Harmon remains an undeniable cornerstone of NCIS. To millions of fans, he’s the stoic, rule-breaking, and fiercely loyal Leroy Jethro Gibbs. But to his former castmates, even years after he stepped away from the main role, he’s still, simply, “Boss.” This enduring moniker isn’t just a nod to his character’s rank; it’s a profound reflection of the respect, admiration, and almost familial bond he cultivated on set.
This unique dynamic was recently highlighted by Sean Murray, who has played the integral role of Special Agent Timothy McGee since the show’s early days. “I know his name is Mark, but after 20 years, I still call him ‘Boss’,” Murray shared in a recent interview. “It just feels unnatural to call him anything else.” This sentiment is echoed consistently by the entire NCIS cast, illustrating the deep and lasting impact Harmon had, and continues to have, on the show’s production and the lives of its people. It’s a rare testament to a lead actor’s influence, extending far beyond the script and the screen.
For the cast members, Harmon was much more than just a talented actor leading the ensemble; he was seen as the true pillar and spiritual father figure of the NCIS family. His quiet authority, unwavering professionalism, and steadfast commitment to the show’s integrity set the tone for the entire production for nearly two decades. He fostered an environment of discipline and dedication, yet also one of profound camaraderie and mutual respect. This deep respect and affection persist to this day. Even with Harmon no longer regularly on set, reports indicate that cast members still stay in touch with him and even seek his insights on significant script developments or character arcs, valuing his perspective as the show’s long-standing anchor.
Mark Harmon’s influence on NCIS truly transcended his on-screen portrayal as the commanding Special Agent in Charge. In the world of NCIS, he wasn’t merely the boss within the narrative; he was, and clearly remains, the authentic “soul” of the show in real life. His legacy is indelibly etched not just in the hundreds of episodes he starred in, but perhaps more significantly, in the unwavering loyalty, profound respect, and lasting bonds he forged with his colleagues, a powerful testament to his genuine leadership and the indelible mark he left on one of television’s most successful franchises.
