Castle: [to his daughter Alexis] I just want someone to come up to me and say something new.
Beckett: Mr. Castle?
Castle: [turning around holding a pen ready to give an autograph] Where would you like it?
Beckett: [holding badge] Detective Kate Beckett, NYPD. We need to ask you a few questions about a murder that took place earlier tonight.
Alexis: [taking the pen from him] That's new.

Ryan: [pointing to inscription on Castle's book] From the library of Katherine Beckett.
Beckett: Do you have a problem with reading, Ryan?
Esposito: Yo, check it, girl, you're totally a fan!
Beckett: Right. Of the genre.
Ryan: Right, the genre, that's why you're blushing.
Beckett: What are you, twelve?

Castle: [to Beckett] Well, you're not bridge and tunnel. No trace of the boroughs when you talk, so that means Manhattan, that means money. You went to college, probably a pretty good one. You had options. Yeah, you had lots of options, better options, more socially acceptable options, and you still chose this. That tells me something happened. Not to you. No, you're wounded, but you're not that wounded. No, it was somebody you cared about. It was someone you loved. And you probably could have lived with that, but the person responsible was never caught. [realizing he's overstepped] And that, Detective Beckett, is why you're here.
Beckett: Cute trick. Don't think you know me.
Castle: [hesitant] The point is, there's always a story... you just have to find it.

Beckett: Half of the guys are waiting for prints. You don't just jump the line.
Castle: Oh, I think somebody feels threatened.
Beckett: I'm not threatened.
Castle: No, no, I get it. I can call the mayor and you can't.
Beckett: We have procedure. Protocol.
Castle: Yeah, and you always come to a complete stop at a red light and you never fudge your taxes. Tell me something: do you ever have any fun? Let your hair down? Drop your top? A little "cops gone wild"?
Beckett: You do know that I'm wearing a gun?

Beckett: You wanted to see me, sir?
Montgomery: Yeah. I just got a call from the mayor's office. Apparently, you have a fan.
Beckett: A fan, sir?
Montgomery: Rick Castle. Seems he's found the main character for his next set of novels: a tough but savvy female detective.
Beckett: ... I'm flattered?
Montgomery: Don't be. He says he has to do research.
Beckett: Oh no.
Montgomery: Oh yes.
Beckett: No way.
Montgomery: Beckett, listen.
Beckett: Sir, he is like a nine-year-old on a sugar rush, totally incapable of taking anything seriously.
Montgomery: But he did help solve this case. And when the mayor's happy, the commissioner's happy. And when the commissioner's happy, I'm happy.
Beckett: How long, sir?
Montgomery: [motioning to his door] It's up to him.
[Beckett turns to find Castle standing in the doorway, smirking]

Esposito: [To Beckett] A control freak like you with something you can't control? No, no, that's gonna be more fun than Shark Week.

Beckett: Richard Castle, you are under arrest for felony, theft, and obstruction of justice!
Castle: [Smiling] You forgot making you look bad.

Castle: Three men huddled around a computer... that better not be porn. And if it is, I want in.

Castle: Well, apparently, in an actual homicide, they don't know who did it until the guy gets caught.

Police rep: Mr. Castle, be advised: if you get injured following Detective Beckett to research your next novel, you cannot sue the city. If you get shot, you cannot sue the city. If you get killed...
Castle: My lifeless remains cannot sue the city?
Police rep: Your heirs, Mr. Castle, your heirs.

Beckett: Mrs. Peterson? Detective Kate Beckett, NYPD. I was wondering if I could ask you some questions about Sarah Manning.
Mrs. Peterson: Of course. Please come in.
Beckett: Thank you.
Castle: Richard Castle, just... N.Y.

Castle: [his murder theory] You see him every day, only you never notice him. But he noticed Sara. She's young, beautiful, the kind of girl that a guy like him would never have a chance with. We all know girls like that don't we? Well, at first, it's just a game. Figure out her schedule. When does she do her laundry? When is she alone? Until it becomes something more, something that he can't control. Well, he uses the stairs, obviously, to avoid the elevator's cameras. And then he just waits, concealed in the shadows. When she comes into that laundry room, he pounces. When he looked into her vacant, lifeless eyes, he wanted to tell her he never meant to kill her. All he ever wanted was to be noticed. That's when he felt the heat of that dryer on his skin. So he picks up her limp body in his arms and gently places it inside. He almost smiled at his good fortune when he found the quarter in his pocket, slipping it into the slot. Buying him the time to do what he does best... disappear.
[pauses, then continues] Just saying, better story. Coffee?

Castle: Who was murdered, and was it gruesome?

Castle: [after getting pinched on the ear by Beckett because he was listening to her phonecall] Next time, put it on speakerphone.

Castle: Reading the paper? You are going to lose all of your wired teen hyper texting nano gizmo street cred.
Alexis: I'm a rebel. I kick it old school.