Curious World Staff
Mark Harmon has become nearly synonymous with NCIS, having starred in the show since its 2003 debut. Beyond his on-screen role as Leroy Jethro Gibbs, he also serves as an executive producer, giving him significant influence behind the scenes. But the way he came to dominate NCIS may surprise some fans.
The Origins of NCIS
NCIS was born out of JAG, a show created by TV veteran Donald Bellisario. After JAG struggled on NBC, CBS picked it up, and its success eventually led to the creation of NCIS. A few JAG characters even crossed over, like Bud Roberts Jr. (Patrick Labyorteaux) and A.J. Chegwidden (John M. Jackson), paving the way for future crossover potential.
Harmon’s Power Move
Bellisario, known for hits like Magnum P.I., Airwolf, and Quantum Leap, had a hands-on, often chaotic management style. Harmon and his co-stars endured grueling 16-hour days and unpredictable rewrites. According to TV Guide, Harmon finally went to CBS executives to complain.
The result? Bellisario was forced out as executive producer, though he retained creator credit and continued working on other CBS projects. The move was controversial, with Bellisario later suing for breach of contract.
A Personal Rift
The conflict was more than professional. Harmon’s portrayal of Gibbs hit close to home for Bellisario, who named the character after his own father and grandfather—Leroy and Jethro. One of the show’s early stars, Sasha Alexander, also left due to the demanding schedule, breaking down in tears when she told Bellisario she couldn’t go on.
Harmon’s Paycheck
While Harmon doesn’t make Friends-level syndication money, he’s done well. He reportedly earns $525,000 per episode, more than the Game of Thrones stars made in their final season. With executive producer credits and syndication, his take-home per episode is likely even higher.
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