McGee: Not a hacker, either.
Ziva: How do you know?
McGee: My firewall hasn't been penetrated.
Tony: Lubricant helps, but everybody has dry spots.
(Ziva laughs)

(Gibbs walks into the squad room)
Gibbs: Come on, grab your gear. Don't wanna miss the school bus.
Tony: Class trip, boss?
Gibbs: Got a dead petty officer in a high school stairwell. Janitor found him this morning.
Tony: Hmm. (Starts singing) Wheels on the bus go...
Gibbs: (Gibbs joins in) ...round and round, round and round, round and round...

Admiral Chase: Does Agent David carry a weapon?
Gibbs: She is a weapon.

Ziva: I remember my first fight. I was eight. Shmuel Rubinstein.
Tony: Sounds like a real stud.
Ziva: One punch and it was over.
Tony: What did poor Shmuel do to deserve the wrath of Ziva?
Ziva: He said he liked me.

(After McGee has opened a parcel containing a blow up doll)
McGee: Erm...real funny, Tony.
Tony: (Laughs) You think I did this?
Ziva: I would not put it past you.
Tony: Guys! Come on, a little credit, please. I have grown past this kinda sophomore thing. I mean, who would do something so...genius! McGee with a plastic girlfriend! Congratulations, Tim! She's very sweet.
McGee: The receipt's got my credit card information on it. It must be some kind of mistake.
Ziva: I would cancel your credit card.
McGee: Right now, all I need to do is figure out how to deflate this thing.
Tony: Oh that's easy, there's always a button right here on the back of the neck...
(Tony realises what he has just said)...there's no reason I should know that.

One gets over a watch. You never get over a loved one.

Ziva

(Ziva, Tony and McGee are discussing Ziva's vacation with her elusive boyfriend)
McGee: So when do we get to meet him? And please tell us his name!
Tony: Oh no! Please, let me guess. Zeus? Er...Thor?
Ziva: His name is Ray.
Tony: Ray! What a nice little name! Ray, like Ray Crocker, Ray Charles, Sugar Ray...
Ziva: Erm...I promise you, Ray is a good man.
(Tony smiles at her jokingly before he realises she is being serious)

Doug: Stop talking to me like that.
Tony: Stop lying to me like that.

Tony: What's goin' on here? We being replaced by younger models?
Ziva: I am a younger model.
Tony: If that was intended to hurt me you've succeeded.
Ziva: And we are not being replaced. They are from Waverly University.
Tony: Oh yeah. That's right. Director Vance's internship program. It's not a good idea. Feeds McGee's need to have groupies.

Ziva: Hello, Abby.
Abby: WHAT THE HELL IS WRONG WITH YOU? How could you have doubted Tony, after everything you've been through together? You really think Tony killed Rivkin because he was jealous?! You weren't thinking. That's right, you weren't thinking. Although I supposed I can understand your initial reaction. You were at an emotional time for you, when people act rashly. But to tell Gibbs that you didn't trust Tony?! Which again, I can understand, I mean, he did just shoot your boyfriend... in your living room... to death. Alright, I'll give you that.

Ziva: I'm sorry if I hurt you in all of this. It was never intended. Tony, I care too much about our...friendship. I do not want it to be awkward between us.
Tony: Hey. [Kisses her forehead.] Nothing's awkward between friends.

Gibbs: Facebook. That's that thing that some people... do stuff with?
Ducky: The term is social networking.

NCIS quotes are not to be missed. The crime solving is great and all, but the one-liners from the characters - and Tony's movie quotes, and Gibbs' one-word zingers - are often some of the most memorable parts of a given episode. Be it simple or profound, the show has a way of amping up the drama when it matters most and using levity to keep things grounded. NCIS quotes cover the full spectrum and then some.

NCIS Quotes

McGee: All right. Well you should probably know that Abby and I used to date?
Bishop: Ew. Like, each other?
McGee: Yeah.
Bishop: Wait - isn't that a violation of rule 12, never date a....
McGee: It was a long time ago. After we'd broken up, one night I went to her lab. Found a scribbled piece paper; a list. Potential boyfriends had to fulfill certain conditions by a pre-arranged date or else, goodbye.
Bishop: Such as.
McGee: Things started off relatively normal: opening the door for her, flowers, putting the seat down. Then around number 8, it gets uh...
Bishop: What?
McGee: Does she know you have these?
Bishop: Does she know you have these?
McGee: Yeah she wasn't happy when she found out.
Bishop: These are all very specific.
McGee: Yeah.
Bishop: These ideas apply to you?
McGee: No those rules weren't in place when we were together. At least I don't think so.
Bishop: What's with the two month cutoff? Abby's sabotaging herself. I've seen stuff like this before. We have to talk to her.

Cabot: As you know, the Navy is trying harder than ever to eradicate sexual assault in their ranks.
Gibbs: Was Ensign Tate a rape suspect?
Cabot: Right to the point, as always. No Gibbs, Tate was a second-party complainant. He reported an assault on behalf of a friend.