For nearly two decades, Mark Harmon was the beating heart of NCIS, a steady force at the center of the world’s most-watched crime drama. But as the actor himself reveals, his iconic run as Special Agent Leroy Jethro Gibbs almost never happened—all because of a name.

In a rare moment of reflection, Harmon, now 72, opened up about his earliest days on NCIS in an interview with Entertainment Tonight, while promoting his latest book, Ghosts of Honolulu. He’s candid, even a little amused, as he recalls the one non-negotiable demand he made before ever agreeing to step into Gibbs’ shoes. “I didn’t like NCIS at first,” Harmon admits, his voice carrying a hint of mischief. “But the name Leroy Jethro Gibbs… that got me interested.”

It’s almost hard to imagine now, but the character that would become television’s most quietly formidable lawman was nearly called something much more ordinary—Bob Johnson. For Harmon, that was almost a deal breaker. “At one point, they wanted to change it to Bob Johnson,” he remembers, shaking his head at the memory. “I said, ‘No, it has to be Leroy Jethro Gibbs.’” The show’s creator pushed back, but Harmon stood his ground. And in the end, he got his way. “I’m glad we stuck with it,” he says, a smile breaking through. “It just had to be this way.”

It’s a testament to Harmon’s instincts—and perhaps a little stubbornness—that the name stuck. Leroy Jethro Gibbs is now etched in the annals of TV history, a character as distinctive and enduring as any detective or lawman before him. For 19 seasons, Harmon’s Gibbs was the steady hand at the helm, guiding his team—and the show’s millions of viewers—through twist after twist, loss after loss, and more than a few memorable comebacks.

Even after Harmon’s departure in 2021, the shadow of Gibbs still lingers over NCIS. The show has soldiered on, bringing in veteran actor Gary Cole as the new team leader, Alden Parker. But for loyal fans, the question remains: will Mark Harmon ever return?

It’s a question that the actor, and the show’s creators, seem happy to leave tantalizingly open. Harmon himself has been careful not to close the door entirely. “Gibbs isn’t retired,” he’s said more than once, leaving just enough hope for a future cameo. Executive producer Steven Binder has only added fuel to the fire, insisting that Gibbs is not gone forever, and that the NCIS universe is always open to a familiar face returning—if only for an episode or two.

Unlike so many TV dramas that tie up their leading man’s story with a neat bow, NCIS has always left room for the unexpected. Gibbs’ exit was emotional but open-ended: after years of service, he chooses not to return to Washington, D.C., instead finding peace in the wilds of Alaska. There’s no grand funeral, no final case—just a quiet goodbye and the sense that, somewhere out there, Gibbs is still watching over his team.

For Harmon, the decision to leave was both personal and practical. “I’m getting older, just like Gibbs,” he admits, a touch of wry humor in his voice. The exit storyline felt right, he says—true to the character and to himself. But if you listen closely, there’s always the hint that the door isn’t quite closed. “It just made sense,” he says of the ending. “But you never say never.”

For now, the world of NCIS continues to spin, new mysteries unfolding each week, new faces stepping up to fill the void. But for millions of viewers, and for Harmon himself, the legend of Leroy Jethro Gibbs is far from over. All it takes is a name—a name that, thanks to Harmon’s insistence, will always mean something special to the fans who watched him bring Gibbs to life, year after year