NCIS Star Mark Harmon's Favorite Gibbs Rule: Be Prepared with a Knife (2026)

In the world of television, where characters come and go, it's rare to find an actor who embodies a role for nearly two decades. Mark Harmon, the beloved portrayer of Leroy Jethro Gibbs on CBS' hit show NCIS, is one such actor. Recently, Harmon made an appearance on the official NCIS podcast, 'NCIS: Partners & Probies,' alongside his former co-stars and the show's technical advisor, Leon Carroll Jr. During this nostalgic reunion, Harmon revealed his favorite of Gibbs' famous rules, and it's a rule he himself follows diligently.

The Legacy of Gibbs' Rules

For those unfamiliar with the show, Gibbs, played by Harmon, is known for his no-nonsense attitude and his unique set of rules, which he imparts to his younger colleagues as words of wisdom. These rules, often delivered with a deadpan expression, have become iconic and beloved by fans. From Rule 10, 'Never get personally involved in a case,' to Rule 51, 'Sometimes you're wrong,' Gibbs' rules offer a glimpse into his character's mindset and values.

Harmon's Favorite Rule

When asked which of Gibbs' rules is his favorite, Harmon didn't hesitate. He reached into his pocket and pulled out a Swiss army knife, saying, 'Carry a knife is a good one for me.' This rule, introduced in Season 1, has clearly stuck with Harmon. He explained how useful a knife can be, calling it a 'handy tool.' However, he also cautioned against forgetting it when traveling, as it can lead to an unpleasant surprise at airport security.

A Boy Scout's Motto

Harmon's choice of Rule #9 is particularly intriguing when we consider Gibbs' character. Gibbs is often described as a modern-day Boy Scout, a man of integrity and preparedness. His rule to 'carry a knife' aligns perfectly with the Boy Scout motto of 'Be Prepared.' It's a rule that speaks to Gibbs' practical nature and his belief in being ready for any situation, no matter how unexpected.

The Impact of Gibbs' Departure

Harmon's departure from NCIS in Season 19 left a void in the show, but his character's presence was still felt in the most recent season. When Gibbs' former colleague and friend, Leon Vance, was tragically killed in the line of duty, it seemed like the corrupt CID director, Wayne Rogers, would go free. However, in a twist that felt very Gibbs-like, Rogers met his end at the hands of a sniper's bullet, a clear nod to Gibbs' legendary marksmanship. This event, coupled with the team leader, Alden Parker, cooking up some Alaskan salmon (a hint at Gibbs' new life in Alaska), suggests that Gibbs and Parker may have collaborated on a measure of revenge to honor their fallen friend.

A Lasting Legacy

Gibbs' rules and Harmon's portrayal of the character have left an indelible mark on the show and its fans. Even after his departure, Gibbs' presence continues to be felt, and his rules remain a guiding light for the team. It's a testament to the power of character development and the impact an actor can have on a show's legacy. Harmon's choice to follow Gibbs' rule to 'carry a knife' is a small but significant detail that adds depth to his character and showcases his commitment to the role.

Conclusion

In a world where television shows often rely on shock value and sensationalism, NCIS and Gibbs' rules offer a refreshing take on character development and storytelling. Harmon's choice to follow Rule #9 is a subtle reminder of the show's enduring appeal and the impact it has had on its audience. It's a reminder that sometimes, the simplest rules can have the most profound impact.

NCIS Star Mark Harmon's Favorite Gibbs Rule: Be Prepared with a Knife (2026)
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