[Brown is telling Billy why he signed up for the police] Brown: So she tells me, "You never finish anything. You finish the police course, you get taken care of again, baby." So after graduation, I get a blowjob again. Billy Costigan: That's great. Y...
Billy Costigan: You don't have any cats. Madolyn: No. Billy Costigan: I like that.
Billy Costigan: Hey, you fellas come from Providence? Providence Gangster #2: Isn't any of your business where we come from, is it, now? Billy Costigan: Fuckin' delivering cannolis or something?
Colin Sullivan: You're an FBI informant? Are you fucking kidding me? Frank Costello: Grow up! [laughing] Frank Costello: Of course I talked to the FBI. Colin Sullivan: Do they know who I am? Frank Costello: I... I never gave up anybody... who wasn't ...
Billy Costigan: You sit there with a mass murderer. A mass murderer. Your heart rate is jacked, and your hand... steady. That's one thing I figured out about myself in prison. My hand does not shake... ever.
Frank Costello: I got this rat, this gnawing, cheese eating fuckin' rat and it brings up questions... You know, see, Bill, like you're the new guy. Girlfriend... Why don't you stay in the bar that night I got your numbers. Social Security numbers. Ev...
Billy Costigan: [to Frank Costello] You accuse me once, I put up with it. You accuse me twice... I quit. You pressure me to fear for my life and I will put a fucking bullet in your head as if you were anybody else. Okay? [Frank drops something. He re...
Colin Sullivan: Just fucking kill me. Just fucking kill me. Billy Costigan: I am killing you.
Kneecapped Bankrobber: [after being shot in the knee] I thought you were supposed to go into shock! I'm not in shock! It fuckin' hurts!
Fitzy: She didn't notice us, she must be a cop. Delahunt: Yeah, she's probably the fucking Police Commissioner.
Frank Costello: When I was growing up, they would say you could become cops or criminals. But what I'm saying is this. When you're facing a loaded gun, what's the difference?
Uncle Ed: What's this I hear from Stephanie about you becoming a policeman? Billy Costigan: You mean Stephanie, who was the only one who came to my father's funeral? That Stephanie? Uncle Ed: Yeah, *that* Stepanie. Billy Costigan: Nothing much to it,...
Frank Costello: Jeez. She fell funny. [chuckles at the dead bodies] Mr. French: Francis, you really should see somebody.
Frank Costello: You know, if your father were alive, and saw you here sitting with me, let's say he would have a word with me about this. In fact, he'd kill seven guys just to cut my throat, and he could do it. That's maybe something you don't know a...
Billy Costigan: I mean the guy murdered somebody right? The guy fuckin' murdered somebody and you don't fuckin' take him!
Colin Sullivan: What Freud said about the Irish is: We're the only people who are impervious to psychoanalysis.
Frank Costello: [talking about Costigan] Do you trust him? Mr. French: Well these days, who's reliable? Frank Costello: His uncle Jackie was. Yeah, you can't trust a guy acts like he's got nothing to lose. Mr. French: I'm reliable. Frank Costello: Ar...
Madolyn: Here, this is my card. Colin Sullivan: Nah, I don't need that. I'm a detective. I'll find you. [elevator door begins to close; Colin reaches out] Colin Sullivan: No, I'm just kidding, I need the card.
