If someone thinks they have the upper-hand, break it. (Season 8, Episode 24)

Rule #16

• Permalink: If someone thinks they have the upper-hand, break it.
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It's better to seek forgiveness than ask permission. (Season 3, Episode 4)

Rule #18

• Permalink: It's better to seek forgiveness than ask permission.
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Never, ever bother Gibbs in interrogation. (Season 4, Episode 10)

Rule #22

• Permalink: Never, ever bother Gibbs in interrogation.
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Never mess with a Marine's coffee if you want to live. (Season 2, Episode 9)

Rule #23

• Permalink: Never mess with a Marine's coffee if you want to live.
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Rule #27: Two ways to follow: First way, they never notice you, Second way, they only notice you. (Season 7, Episode 15)

• Permalink: First way, they never notice you, Second way, they only notice you.
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Always watch the watchers. (Season 8, Episode 22)

Rule #35

• Permalink: Always watch the watchers.
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If feels like you're being played, you probably are. (Season 9, Episode 1)

Rule #36

• Permalink: If feels like you're being played, you probably are.
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Your case, your lead. (Season 6, Episode 16; Season 10, Episode 3)

Rule #38

• Permalink: Your case, your lead.
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There is no such thing as coincidence. (Season 7, Episode 21)

Rule #39

• Permalink: There is no such thing as coincidence.
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There is no such thing as a small world. (Season 10, Episode 14)

Rule #39A

• Permalink: There is no such thing as a small world.
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If it seems someone is out to get you, they are. (Season 7, Episode 22)

Rule #40

• Permalink: If it seems someone is out to get you, they are.
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Gibbs: (as he and Quinn look at the Vietnam Memorial Wall) No matter how many times I come here, it still gets to me. You look at a name, and you have to look at a reflection of yourself. You are among the fallen.
Quinn: Yeah. Difference is, you can leave. The names don't.

• Permalink: (as he and Quinn look at the Vietnam Memorial Wall) No matter ho...
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