I have a lot, but I'll just post the ones from the first season for now.
Horatio: Let me ask you another question; when you're home alone do you lock the bathroom door?
Catherine: I don't even know you.
Megan: Where are you going?
Horatio: I'm going where we're all going: back to those seventeen seconds.
Horatio: I'm off to ruin a captain's day!
Horatio: You got something for me?
Calleigh: I got a question.
Horatio: Shoot.
Calleigh: How old are you?
Horatio: (Makes an amused face) Mmm. Forty-five. Caliber round, right?
Horatio: Okay, well I can tell you that this was done with an excimer laser and its inscription point was no more than three microns in diameter.
Delko: (Chuckles) Okay, how do you know that though? Were you a jewel thief in another life or what?
Calleigh: What about that guy in the Acapulco T-shirt? Did he give prints?
Delko: No, but you think we could arrest him based on the fact that it's a little too creepy to be in one of these places without a kid?
Calleigh: Do you believe her story?
Horatio: I don't know. I guess that depends on whether you like seeing men dress up in your underwear or not.
Christopher Harwood: Don't you want to know why?
Horatio: You just killed four innocent people. You're evil. You enjoy death. I hope you enjoy your own.
Alexx: No vaginal tearing, no signs of semen. Guy went to a lot of trouble for no apparent personal or sexual motive.
Horatio: Mmm. How about the joy of just taking a life? That's always good.
Horatio: Here's the irony. Had you not been kind enough to provide me with the murder weapon I would have been stuck with negligent homicide for the neighbor. But as it stands now, I can charge you with murder. And I haven't even gotten to the 19 year old who OD'd.
James Welmont: So what are you saying?
Horatio: I'm just saying, thanks.
Horatio: A 268? So he's not just a b-and-e guy. He's a rapist, too.
Detective Bernstein: Gets better.
Horatio: It gets better than a rapist being raped? How?
Delko: Tell me about it. I heard radioactivity can cause temporary infertility.
Speed: So, you and your girlfriend are temporarily in luck.
Delko: Yeah, or permanently screwed.
Horatio: Okay. The husband's dead, the wife is dead…
Frank: Russian's dead.
Horatio: Yes, let's go talk to the other Russian, the cousin, before he chokes on a twizzler.
Don Haffman: I like smoking a Monte Cristo number two after winning a slam-dunk
case. Your grandma wouldn't be trying to screw me out of a good cigar
Speed: (talking to H on the phone) All right, I'll tell him.
Delko: What did he say?
Speed: "Throw another rock." What does that mean?
Delko: It means we got a long night ahead of us.
Horatio: This cocaine did not come from Haiti.
Speed: Not unless Haiti's in the middle of our crime lab.
Horatio: That's right.
Danny Maxwell: Kill someone? I saved lives. Eric, you were there. You saw me. I should be getting a medal, not the third degree.
Speed: That's an ironic choice of words.
Speed: What's with the no-ac, man?
Delko: Had my phone on vibrate, I was, uh, a little busy.
Speed: Yeah?
Delko: Didn't want to be interrupted.
Speed: Busy with the left hand?
Delko: Funny.