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

Rule #51

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

Rule #1

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

Rule #1

Bishop: Seriously? How'd you get that?
Tony: Well, it's like Gorillas in the Midst. You'll get to understand his grunts.

Martinez: Bishop! You didn't tell me Robert Redford was in the building.
Tony: Come on. I rarely get the Redford. You could be my Debra Winger, legal eagle.
Martinez: I love her.

Delilah: What is it?
McGee: I don't know. I can't hear. I'll meet you inside?
Delilah: Okay.

Tony: Tim butt-dialed me.
McGee: Well it doesn't mean you have to listen.
Tony: Oh yes it does. I find you compelling, Tim.

Bishop: Coyne was seeing Petty Officer 1st Class Patrice Gates.
Tony: They bonded over a shared love for kettle corn and home improvement shows. He snuck into her quarters on a nightly basis and she flew his drone.

McGee: Delilah? This is not a good time.
Delilah: Well I'm not here to see you.
McGee: Then who?
Vance: Me. If that's okay with you, Special Agent McGee.

Mann: It's been six years. You must have something to say.
Gibbs: No, no I'm good.
Mann: Hmm.
Gibbs: If you want to talk, you should ride with DiNozzo.

Oh, boo hoo. My super hot, super smart girlfriend likes me too much? McGee, this is not about space. It's about you being scared. Scared that things aren't going to work out, and somebody's going to get hurt, and then you have to deal with those messy emotions. Delilah is like the best thing that's ever happened to you. You can't protect yourself from everything.

Abby

Bishop: No, Daniel Coyne is a victim. Whoever else has been targeted is a victim. You're a terrorist, and you're going to serve fifty years in federal prison.
Tony: Minimum.
Pace: They're incredible, these weapons I've helped build. You sit behind a computer monitor. Point, click and thousands of miles away, total destruction. Parsa thinks it's only fair we get a taste.

NCIS Quotes

Bishop: Seriously? How'd you get that?
Tony: Well, it's like Gorillas in the Midst. You'll get to understand his grunts.

Torres: When I break out the glass, maybe I can rip out the bars.
Bishop: With what? Your superhuman strength?