Mark Harmon, the seasoned actor who first stepped into the shoes of Leroy Jethro Gibbs in 2003, has long been a cornerstone of the NCIS franchise. After more than a decade of playing the iconic detective, Harmon transitioned from the spotlight to a more subtle, yet equally influential role: executive producer and creative consultant for the spin‑off series NCIS: Origins. In a recent interview with the NCIS: Partners & Probies podcast, Harmon shared insights into what it feels like to hand over the reins to a new actor, to guide a fresh cast, and to shape a show from behind the camera.
From Lead Actor to Executive Producer
When Harmon first joined NCIS in 2003, he was a rising star with a reputation for delivering solid performances. The role of Gibbs quickly became his signature, and he carried the show through 13 seasons, becoming a household name. However, by 2021, Harmon felt it was time to step back and explore other facets of television production. He accepted the role of executive producer on NCIS: Origins, a series that delves into the early career of Gibbs and the formative events that shaped his character.
As an executive producer, Harmon’s responsibilities expanded beyond acting. He now works closely with writers, directors, and the new cast to ensure continuity with the original series while also allowing the spin‑off to carve its own identity. This behind‑the‑scenes role requires a deep understanding of the show’s tone, pacing, and character dynamics—skills Harmon honed during his years on the set of NCIS.
The Transition to Behind‑the‑Scenes Work
Harmon’s shift from on‑screen to off‑screen work was not a sudden decision. He described the process as a gradual handover, where he “waits to be asked” before offering advice or commentary. This approach respects the autonomy of the new cast and crew, allowing them to bring fresh perspectives to the show.
One key aspect of his new role is mentoring the actors who portray younger versions of familiar characters. For instance, Austin Stowell takes on the role of Gibbs in NCIS: Origins. Harmon emphasized the importance of maintaining the essence of Gibbs while also letting Stowell bring his own interpretation to the character. He said, “You’d be surprised by how many people don’t ask.” This highlights the need for open communication and collaboration in a creative environment.
Beyond character work, Harmon also focuses on narrative structure. He helps shape story arcs that honor the legacy of the original series while exploring new themes relevant to contemporary audiences. This balancing act is a hallmark of successful spin‑offs, and Harmon’s experience as a lead actor gives him unique insight into what makes a story resonate with viewers.
Insights from the NCIS: Partners & Probies Podcast
In the exclusive interview on the NCIS: Partners & Probies podcast, Harmon opened up about the challenges and rewards of his new role. He discussed the importance of listening to the new cast’s ideas, and how this collaborative approach can lead to unexpected creative breakthroughs.
Harmon also touched on










