First things first. Hide the women and children. (Season 7, Episode 23)

Rule #44

Never accept an apology from someone who just sucker punched you. (Season 9, Episode 16)

Rule #42

If it seems someone is out to get you, they are. (Season 7, Episode 22)

Rule #40

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

Rule #39A

There is no such thing as coincidence. (Season 7, Episode 21)

Rule #39

Your case, your lead. (Season 6, Episode 16; Season 10, Episode 3)

Rule #38

If feels like you're being played, you probably are. (Season 9, Episode 1)

Rule #36

Always watch the watchers. (Season 8, Episode 22)

Rule #35

Rule #27: Two ways to follow: First way, they never notice you, Second way, they only notice you. (Season 7, Episode 15)

Never mess with a Marine's coffee if you want to live. (Season 2, Episode 9)

Rule #23

Never, ever bother Gibbs in interrogation. (Season 4, Episode 10)

Rule #22

It's better to seek forgiveness than ask permission. (Season 3, Episode 4)

Rule #18

NCIS Quotes

I'm more of a Super-Mario guy, myself.

Captain Wescott

Ducky: Forgive me, Mr. Palmer, but I can’t resist the urge to give you one of my all-time favorite pieces of advice: “If you’re going through hell, keep going.”