NCIS: Origins co-creator David J. North jokes that Mark Harmon may disappoint some audiences of the franchise for a surprising reason. Harmon recently reprised the role of Leroy Jethro Gibbs for a crossover between NCIS and NCIS: Origins, which marked Gibbs’ first substantial return to the long-running CBS procedural since his high-profile departure early on in season 19.

In an interview with Entertainment Weekly, along with fellow NCIS: Origins co-creator Gina Lucita Monreal, North shares a story about having to record a voiceover for some of Gibbs’ famous rules that have recurred throughout the history of NCIS. Harmon, who was the franchise’s lead for most of its run, in addition to being an executive producer on the NCIS: Origins prequel, reveals he doesn’t know the rules — except for perhaps one:

David J. North: We were in the sound studio doing Mark’s voiceover with him the other day. I was talking to him about what this is in episode 5, how so much of it is based on rule No. 11, ‘When the job’s over, walk away.’ And he said, ‘Man, the fans walk up to me nonstop and ask me about those rules.’ I said, ‘Do you know any of them? Do you know one of the rules?’ And he goes, ‘There’s one about a knife.’

North goes on to mention that the reveal may “destroy some fans’ hearts,” because of how crucial Gibbs’ rules have been to NCIS. The exact number of rules varies, depending on who is asked to recite them, but they approach 40. They include never allowing suspects to stay together, always being specific about lies, and bending the line rather than breaking it. The one about the knife, which North mentions, refers to “never going anywhere without a knife.”

If you’ve followed NCIS for years, you already know that Mark Harmon isn’t just a fan favorite — he is the backbone of the franchise for many viewers. When he left his iconic role as Leroy Jethro Gibbs, fans hoped it was temporary. Rumors, whispers, and interviews have kept the speculation alive, fueling hope that Harmon might return.

But now? There’s a new twist. A twist that might “destroy some fans’ hearts.” And the reason behind it is not what anyone expected.

In this deep-dive article, we’ll explore the surprising development surrounding Mark Harmon’s relationship with NCIS, why it’s causing emotional reactions among fans, and what it could mean for the future of the series.

The Bombshell Hint From Mark Harmon

Mark Harmon has always been subtle when discussing his future with NCIS. But a recent behind-the-scenes reveal suggests something fans weren’t prepared for — a possible final step away from Gibbs as they knew him.

Why This Update Is Breaking Fans’ Hearts

The Emotional Connection to Gibbs

For two decades, Gibbs wasn’t just a character. He was:

• The moral anchor

• The calm in the storm

• The team’s beating heart

Losing him once was hard enough. But the latest reveal hints that fans might need to accept a harsher truth — that Gibbs may never return in the way they imagine.

A Permanent Shift Instead of a Temporary Departure

What really surprises fans is the suggestion that Harmon isn’t planning a dramatic comeback. Instead, his involvement in the franchise is changing in a direction few expected.

Harmon’s New Role Behind the Camera

Staying With NCIS… Just Not as Gibbs

Mark Harmon remains an executive producer, which keeps him involved in NCIS, but it also signals a different priority. Instead of stepping back into the spotlight, he may be choosing to guide the franchise from the sidelines — a role both meaningful and bittersweet.

The Gap Between Producer and Actor Roles

Being behind the scenes means:

• No more Gibbs interrogations

• No more boat-building metaphors

• No more head-slaps

• No more dramatic leadership moments

For many fans, this quiet behind-the-camera presence can feel like a soft goodbye.

Fans Wanted a Heroic Return — But They May Not Get One

The Myth of Gibbs’ Miraculous Comeback

In the fandom, theories never stopped:

• “Gibbs will return for the finale.”

• “Gibbs will save the team in season 23.”

• “Gibbs is coming back permanently — Mark Harmon is just hiding it.”

But now, Harmon’s new statements suggest otherwise.

The heartbreak? Accepting that the chapter on Gibbs might be closing rather than pausing.

Why Mark Harmon’s Decision Actually Makes Sense

Protecting the Legacy of Gibbs

Instead of returning just for the sake of nostalgia, Harmon seems committed to maintaining the integrity of the character. Gibbs had a peaceful exit. A meaningful exit. A rare exit.

Bringing him back without purpose could tarnish that.

Harmon’s Respect for the Storyline

He’s always been protective of Gibbs’ arc, and many believe he’s stepping back to avoid diluting the character’s journey. It’s a hard pill to swallow, but a respectable one.

The Surprising Reason This Development Stings

Fans Weren’t Ready for Closure

Harmon’s calm and quiet distance from acting on NCIS unintentionally delivers the emotional blow fans didn’t expect: closure without warning.

A Legacy That’s Impossible to Replace

Even with amazing cast additions, none can recreate the connection fans feel toward Gibbs. Harmon stepping back confirms a truth fans hoped to avoid — no one can fill that void.

How This Could Shape NCIS’ Future

More Spinoffs, Fewer Original Cast Returns

The franchise is expanding, but without Harmon at the forefront, it’s clear the future lies in new faces and fresh stories.

The Era of Gibbs Is Ending… Gracefully

Instead of a dramatic exit, Gibbs’ era may be gently fading — and that’s why it hurts more.

Will Mark Harmon Ever Return at All?

The Door Isn’t Fully Closed

Harmon hasn’t said “never.” He’s simply shifted his involvement.

A One-Episode Cameo? Still Possible

If there’s a perfect moment — series finale, major arc conclusion — Harmon might consider returning. But not as a long-term leader again.

This hint alone keeps fans hopeful… even if their hearts are breaking.

The Emotional Impact on Long-Time Viewers

Nostalgia Is a Powerful Force

Fans grew up with Gibbs. They saw him laugh, mourn, fight, protect, and evolve. Losing him fully feels like losing a familiar voice.

The Heartbreak Comes From Love

The emotional reaction is proof of just how deeply Harmon connected with audiences.

Why Some Fans Still Support Harmon’s Decision

Growth Matters — On and Off Screen

Fans who look at the situation from Harmon’s perspective understand:

• He gave 18 years of his life

• He built a legacy

• He earned the right to rest

Respect for the Character’s Peace

Gibbs finally found calm in Alaska. Disturbing that without a powerful narrative reason would feel wrong.

Could NCIS Survive Without Gibbs Forever?

Surprisingly, Yes

The show still ranks high and continues attracting new viewers.

But Gibbs’ Spirit Will Always Remain

Even without Harmon on screen, the values Gibbs instilled guide every episode.

The Real Reason This “Destroys Fans’ Hearts”

It’s not betrayal.
It’s not disappointment.
It’s not anger.

It’s acceptance.

Fans are realizing the Gibbs era may truly be over — not with a dramatic cliffhanger, but with a quiet fade into TV history.

And that’s what hurts the most.

Conclusion

Mark Harmon isn’t trying to hurt fans — but his latest moves naturally stir strong emotions. His subtle retreat from the on-screen world of NCIS signals a transition fans weren’t ready to face. The pain comes from losing an icon, a leader, and a character who shaped the show’s DNA for nearly two decades.

While this chapter may be closing, Gibbs’ legacy will never fade. And who knows? The door may always remain just slightly open for one final surprise.