Tuesdays 8:00 PM on CBS
Ncis

Rule #1: Never let suspects stay together. (Season 1 Episode 1, Mike Franks)

Gibbs Rules (NCIS)
Rule #1: Never let suspects stay together. (Season 1 Episode 1, Mike Franks)
Never let suspects stay together.

Never let suspects stay together. (Season 1 Episode 1, Mike Franks)

Rule #1
Never screw over your partner.

Never screw over your partner. (Season 4, Episode 14, Gibbs)

Rule #1
Always wear gloves at a crime scene.

Always wear gloves at a crime scene. (Season 1, Episode 1, Mike Franks)

Rule #2
Don't believe what you're told. Double check.

Don't believe what you're told. Double check. (Season 1, Episode 1, Mike Franks)

Rule #3
Never be unreachable.

Never be unreachable. (Season 3, Episode 13, Gibbs)

Rule #3
The best way to keep a secret? Keep it to yourself. Second best? Tell one other person, if...

The best way to keep a secret? Keep it to yourself. Second best? Tell one other person, if you must. There is no third best. (Season 4, Episode 11)

Rule #4
You don't waste good.

You don't waste good. (Season 8, Episode 22)

Rule #5
Never apologize.

Never apologize. (Season 7, Episode 12, but referenced previous times without a number attached)

Rule #6
Always be specific when you lie.

Always be specific when you lie. (Season 1, Episode 23)

Rule #7
Never take anything for granted.

Never take anything for granted. (Season 3, Episode 10)

Rule #8
Never assume.

Never assume. (Season 9, Episode 21)

Rule #8
Never go anywhere without a knife.

Never go anywhere without a knife. (Season 1, Episode 13)

Rule #9
Never get personally involved on a case.

Never get personally involved on a case. (Season 7, Episode 21)

Rule #10
When the job is done, walk away.

When the job is done, walk away. (Season 6, Episode 24)

Rule #11
Never date a coworker.

Never date a coworker. (Season 1, Episode 15, and referenced on other occasions)

Rule #12
Never, ever involve a lawyer.

Never, ever involve a lawyer. (Season 6, Episode 7; Gibbs is said to have other rules involving lawyers, but according to Tony, this is the "umbrella" one)

Rule #13
"Never leave behind loose ends."

Never leave behind loose ends. (Season 3, Episode 24)

Rule #45
Bend the line, don't break it.

Bend the line, don't break it. (Season 11, Episode 4)

Rule #14
Always work as a team.

Always work as a team. (Season 5, Episode 5)

Rule #15
If someone thinks they have the upper-hand, break it.

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

Rule #16
It's better to seek forgiveness than ask permission.

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

Rule #18
Never, ever bother Gibbs in interrogation.

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

Rule #22
Never mess with a Marine's coffee if you want to live.

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

Rule #23
First way, they never notice you, Second way, they only notice you.

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

Always watch the watchers.

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

Rule #35
If feels like you're being played, you probably are.

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

Rule #36
Your case, your lead.

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

Rule #38
There is no such thing as a small world.

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

Rule #39A
There is no such thing as coincidence.

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

Rule #39
If it seems someone is out to get you, they are.

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

Rule #40
Never accept an apology from someone who just sucker punched you.

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

Rule #42
First things first. Hide the women and children.

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

Rule #44
Clean up your own mess.

Clean up your own mess. (Season 7, Episode 24)

Rule #45
Sometimes you're wrong.

Sometimes you're wrong. (Season 7, Episode 24, titled "Rule Fifty-One")

Rule #51
Gibbs' Rule #62

I know rule 62 is to always give people space when they get off the elevator but this is really important and I don't want to waste any time.

Abby
Never trust a woman who doesn't trust her man.

Never trust a woman who doesn't trust her man. (Season 9, Episode 7)

Rule #69
You do what you have to for family.

You do what you have to for family.

Unwritten Rule