Are Mark Harmon and David McCallum friends?

Yes, Mark Harmon and David McCallum were indeed close friends, forging a strong and lasting bond during their extensive time working together on the acclaimed television series, NCIS. Their connection extended far beyond their on-screen roles.

A Deep-Rooted Friendship from NCIS

The set of NCIS was not just a workplace for Mark Harmon and David McCallum; it was where genuine friendships blossomed. Both actors, who portrayed iconic characters for many years, developed a profound respect and affection for each other. Their shared experiences over a long tenure on the show were foundational to their real-life camaraderie.

• Unbreakable Bonds: Actors such as Mark Harmon have openly discussed the profound "unbreakable bonds" formed with their co-stars, including David McCallum. These deep relationships are often a natural outcome of the many years spent collaborating on a highly successful series.
• Behind-the-Scenes Closeness: Their bond was noted to be a true "close friendship behind the scenes," indicating a personal connection that went beyond professional courtesy. This highlights the genuine affection and mutual admiration shared between them.

This strong camaraderie is a testament to the positive environment and shared dedication among the cast members, particularly between those who spent over a decade together shaping one of television's most beloved dramas. The profound connections made during such intense and prolonged periods of collaboration often result in lifelong friendships.