Since NCIS and NCIS Los Angeles ended their season last night with a “cliffhanger” and a “to be continued,” it seemed like a good time to post some updates to the list of rules Leroy Jethro Gibbs has … his code to live by!

Rule #1: Never let suspects stay together.

Rule #1: Never screw over your partner.

Rule #2: Always wear gloves at a crime scene.

Rule #3: Don’t believe what you’re told. Double check.

Rule #3: Never be unreachable.

Rule #4: 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.

Rule #5: You don’t waste good.

Rule #6: Never say “You’re Sorry.” It’s a sign of weakness.

Rule #7: Always be specific when you lie.

Rule #8: Never take anything for granted.

Rule #9: Never go anywhere without a knife.

Rule #10: Never get personally involved in a case.

Rule #11: When the job is done, walk away.

Rule #12: Never date a co-worker.

Rule #13: Never, ever involve a lawyer.

Rule #15: Always work as a team.

Rule #16: If someone thinks they have the upper hand, break it.

Rule #18: It’s better to seek forgiveness than ask permission.

Rule #22: Never, ever bother Gibbs in interrogation.

Rule #23: Never mess with a Marine’s coffee… if you want to live.

Rule #27: There are two ways to follow someone. First way, they never notice you. Second way, they only notice you.

Rule #35: Always watch the watchers.

Rule #36: If you feel like you are being played, you probably are.

Rule #38: Your case, your lead.

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

Rule #40: If it seems someone is out to get you, they are.

Rule #42: Never accept an apology from someone who just sucker punched you.

Rule #44: First things first, hide the women and children.

Rule #45: Clean up the mess that you make.

Rule #51: Sometimes – you’re wrong.

Rule #69: Never trust a woman who doesn’t trust her man.

Other Rules Heard on NCIS

In my country, on my team, working my cases, my people don’t bypass the chain of command.

The “Unspoken Rule” (Franks): You do what you have to do for family.

Don’t work the system when you can work the people.

Don’t stop checking and rechecking evidence until you are satisfied.

If you want to find something, you follow it. (Said by Gibbs to Mike Franks in “Deliverance,)

Besides Rule 13, Gibbs has 6 other rules involving lawyers, but, according to DiNozzo, “You only need to know number 13; it’s the umbrella one.”

Never second guess yourself in a relationship and life.

McGee has formed his own set of rules; #1 is Never Lie to Gibbs.

When DiNozzo was in charge, he made a set of rules. DiNozzo #3: Never underestimate your opponent.