NCIS has been a television institution for over 18 seasons, with millions of fans tuning in each week to follow the exploits of the Naval Criminal Investigative Service team. The show has been praised for its unique blend of action, humor, and strong character-driven storytelling. At the core of this success are two key figures: Mark Harmon and David McCallum. Their characters, Leroy Jethro Gibbs and Donald “Ducky” Mallard, have become iconic in the world of television.
In this oral history, we take a deeper look at the impact both Mark Harmon and David McCallum had on NCIS, from their initial casting to their lasting legacy on the show. We’ll also explore what made their partnership so special and how they became central to the show’s enduring success.
The Beginning of NCIS: Mark Harmon and David McCallum’s Role in Shaping the Show
When NCIS premiered in 2003, it was a spinoff of JAG, focusing on a small unit within the U.S. Navy that investigates crimes involving military personnel. But it was Harmon’s portrayal of the tough yet compassionate Gibbs and McCallum’s eccentric and beloved character, Ducky, that brought the show to life.
Mark Harmon: A Perfect Fit for Gibbs
Mark Harmon had already built a reputation in Hollywood before taking on the role of Leroy Jethro Gibbs. Known for his roles in Chicago Hope and St. Elsewhere, Harmon brought a quiet intensity to the character of Gibbs. His no-nonsense approach to law enforcement was balanced with moments of humor and deep emotional depth. From the moment he appeared on screen, Harmon embodied the role of Gibbs, a man who values loyalty, discipline, and family.
Mark Harmon’s Thoughts on His Role: “Gibbs was a character that felt like a natural fit for me. I’ve always enjoyed roles that require me to step into the shoes of someone who is tough but has a deep sense of responsibility. I think Gibbs represents that duality really well.”
David McCallum: The Heart of the Show as Ducky
David McCallum, famous for his role in The Man From U.N.C.L.E., brought a completely different energy to NCIS as Dr. Donald “Ducky” Mallard. As the team’s medical examiner, Ducky was a quirky, eccentric, and highly knowledgeable character. McCallum’s portrayal of Ducky was filled with charm, wit, and a deep understanding of human nature, creating an emotional anchor for the show.
David McCallum on Ducky’s Appeal: “Ducky was always about finding the humanity in the cases. He wasn’t just looking at bodies – he was looking at lives. That’s something I really connected with. The emotional depth Ducky brought to the show helped balance the more action-packed moments.”
The Chemistry Between Harmon and McCallum: Building an Iconic Partnership
What truly set NCIS apart from other crime procedurals was the dynamic between the cast, especially between Mark Harmon’s Gibbs and David McCallum’s Ducky. Their on-screen partnership became one of the most beloved in TV history, with the two characters complementing each other perfectly. Harmon’s no-nonsense, tough-as-nails attitude contrasted beautifully with McCallum’s more reflective, often whimsical portrayal of Ducky.
A Deep Friendship on and Off Screen
Their relationship off-screen mirrored the camaraderie they portrayed as Gibbs and Ducky. Harmon and McCallum quickly became close friends, and their shared experiences over the years only deepened their connection. This bond translated seamlessly into their performances, making their relationship feel authentic and layered.
Mark Harmon on His Relationship with David McCallum: “David is a joy to work with. He has this wonderful ability to bring warmth and humor to any situation. He’s a true professional, and we’ve built a strong bond over the years.”
David McCallum on Working with Mark Harmon: “Mark and I have shared many moments, both on and off screen, that have made this experience unforgettable. He’s a great leader and someone you can always count on. The friendship we’ve developed has been one of the highlights of my career.”
Iconic Moments: Gibbs and Ducky’s Impact on NCIS
Over the years, Gibbs and Ducky have had countless memorable moments that have solidified their place in NCIS history. Whether it’s Gibbs’ famous rules or Ducky’s emotional monologues, these two characters have touched the hearts of viewers around the world.
Gibbs’ Rules: A Legacy of Wisdom
Gibbs’ rules have become a hallmark of the show. These simple, often cryptic phrases have provided guidance not only for the team but also for the audience. Rules like “Never apologize, it’s a sign of weakness” and “Don’t ever bother me with a matter that is not of national importance” have become iconic.
Mark Harmon on the Rules: “The rules are just a small part of who Gibbs is. They represent his need for control and order in an unpredictable world. Over time, they’ve become a shorthand for the values that Gibbs holds dear.”
Ducky’s Emotional Monologues: A Look at the Past
One of Ducky’s signature traits was his ability to speak eloquently about the victims’ lives, offering emotional and philosophical insights. His monologues were often filled with warmth, and McCallum’s delivery brought depth to every word.
David McCallum on Ducky’s Wisdom: “Ducky never just saw a body; he saw a story. It was important to me to make sure that Ducky’s reflections weren’t just about science, but about the human experience. His empathy was key to making him a beloved character.”
The End of an Era: Mark Harmon’s Departure from NCIS
In 2021, after 18 seasons, Mark Harmon made the decision to step back from his full-time role on NCIS. His departure marked the end of an era for the show, as Gibbs was one of the central pillars of the entire franchise. While Harmon didn’t completely leave the show, stepping into a more limited role, his absence left a noticeable void for both the team and the fans.
A Farewell to Gibbs
The way Gibbs was written out of the show — leaving the team for a quieter life — allowed for a fitting end to his character arc. The emotional weight of his departure was felt deeply by the NCIS team and its viewers. Despite his reduced role, Mark Harmon’s legacy as Gibbs continues to influence the show’s direction.
Mark Harmon on His Departure: “Leaving the show wasn’t an easy decision. But after 18 years, I felt like it was time for Gibbs to step back. I will always have a deep connection to the character and the amazing team that I’ve had the privilege of working with.”
David McCallum’s Continued Role in NCIS
While Harmon’s departure was a significant change, David McCallum remains a core part of the NCIS team as Dr. Ducky Mallard. His character continues to provide wisdom and heart to the show, even as it evolves. McCallum has expressed his gratitude for being able to continue his role in the series.
David McCallum on Ducky’s Legacy: “Ducky’s been a part of my life for so long now, it feels like second nature. I’m thankful to still be part of this incredible team and to continue telling stories that resonate with viewers.”
Conclusion: Mark Harmon and David McCallum’s Enduring Legacy
As the show moves forward, the legacies of Mark Harmon and David McCallum will continue to influence the world of NCIS. Their iconic characters, Gibbs and Ducky, will forever be remembered as central to the show’s success. From their unforgettable performances to their behind-the-scenes camaraderie, these two actors have shaped NCIS into the beloved series it is today.
Through their work, Harmon and McCallum have created characters that are more than just detectives or medical examiners—they are symbols of loyalty, integrity, and compassion. Their contributions to NCIS will never be forgotten.
Frequently Asked Questions (FAQs)
1. How did Mark Harmon’s portrayal of Gibbs define NCIS?
Mark Harmon’s portrayal of Gibbs brought depth and complexity to the character, combining toughness with a deep sense of loyalty. His iconic role helped establish NCIS as a show that valued both action and emotional storytelling.
2. What makes David McCallum’s character, Ducky, so beloved by fans?
Ducky’s quirky, warm personality, coupled with his deep empathy for the victims, made him one of the most beloved characters in the series. His emotional monologues and wisdom added heart to every episode.
3. Why did Mark Harmon decide to step back from his role as Gibbs?
After 18 seasons, Mark Harmon decided to step back from his full-time role to allow the character of Gibbs to transition. However, he remained involved in the show in a limited capacity.
4. How did Gibbs’ rules contribute to the success of NCIS?
Gibbs’ rules became a cornerstone of his character, representing his no-nonsense approach to life and law enforcement. They became a recognizable aspect of the show, offering guidance for both the team and viewers.
5. What’s next for David McCallum’s character, Ducky, on NCIS?
David McCallum’s character, Ducky, remains an integral part of the NCIS team. His ongoing wisdom and contributions continue to enrich the series as it moves forward without Gibbs in the same role.
