NCIS stars have confirmed what many fans had long suspected about Mark Harmon’s behavior on set—his commitment to professionalism and dedication to the show’s success was unmatched. While Harmon was known for his stoic and sometimes quiet demeanor, behind the scenes, he was often described as the glue that held the NCIS team together.

According to co-stars, Harmon’s behavior was always one of focused intensity, ensuring every detail was perfect. He took his role as Leroy Jethro Gibbs seriously, often going above and beyond to help fellow cast members with their performances. Harmon’s leadership didn’t stop at his character on-screen—it extended to his interactions with the crew, always respectful and encouraging.

However, the confirmed insight that has most fans talking is how Harmon’s quieter approach was often mistaken for being distant. While some might have thought he was aloof, it turns out his reserved nature was simply a reflection of his focus and dedication. This behavior became particularly clear during emotional scenes, where Harmon’s intensity and commitment to authenticity were key to making the show feel genuine.

For many, the confirmation of his quiet strength adds a deeper layer to the beloved character of Gibbs. His reserved yet caring presence on set mirrored the way he portrayed Gibbs—always reliable, always there for his team. Now that Harmon’s departure from the show has been confirmed, the respect and admiration his co-stars have for him is more evident than ever.