10 Most Important Gibbs Rules in NCIS, Ranked

Here are the 10 Most Important Gibbs Rules from NCIS, ranked based on their significance to the show’s storytelling and the moral code of Leroy Jethro Gibbs:


10. Rule 9: “Never go anywhere without a knife.”

A practical rule that’s saved lives countless times, highlighting Gibbs’ readiness for any situation.

9. Rule 15: “Always work as a team.”

Teamwork is at the heart of NCIS. Gibbs instills the value of collaboration, emphasizing trust and unity.

8. Rule 3: “Don’t believe what you’re told. Double-check.”

A reminder of the importance of skepticism and thorough investigation, crucial in the world of crime-solving.

7. Rule 12: “Never date a coworker.”

This rule often leads to tension, as it’s frequently broken. It reflects Gibbs’ belief in maintaining professionalism despite personal feelings.

6. Rule 5: “You don’t waste good.”

Gibbs values talent and loyalty, ensuring every team member knows their worth and contributes fully.

5. Rule 8: “Never take anything for granted.”

Staying vigilant and aware is vital in the unpredictable world of NCIS, where danger often lurks beneath the surface.

4. Rule 1: “Never let suspects stay together.”

One of Gibbs’ earliest rules, it’s essential for maintaining control during interrogations.

3. Rule 13: “Never involve lawyers.”

A tongue-in-cheek nod to avoiding complications, this rule encapsulates Gibbs’ preference for direct action.

2. Rule 6: “Never say you’re sorry. It’s a sign of weakness.”

While controversial, this rule reflects Gibbs’ tough exterior and the necessity of confidence in high-pressure situations.

1. Rule 39: “There is no such thing as coincidence.”

Arguably the most iconic rule, it underscores Gibbs’ investigative philosophy and his belief that everything happens for a reason.


These rules not only define Gibbs’ character but also serve as guiding principles for the NCIS team, blending humor, wisdom, and pragmatism.

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