- David: Pain. Pain is just a state of mind. It's something you learn to live with; I have.
- Captain Frank Sedman: What about Huxley? What is that?
- Peter Sanderson: He was referring to a quote by Thomas Huxley, "The chessboard is the world... the rules of the game are what we call nature. The player on the other side is hidden from us but we know that his play is always fair, just, and patient. We also know that he never overlooks a mistake.
- David's father: I've got a drunk for a wife and a lunatic for a son. I don't need this shit anymore. You're crazy, both of you.
- Peter Sanderson: Computers... that's the way you got into Randall's Roxford's records... You can get into anything
- David: Yes I can... Including your mind! I'm in there right now aren't I Peter? I'll always be with you no matter how disturbed I get
- David: You think that I put you through some BIG ORDEAL? It is nothing compared to what you have caused me! In your eyes, I was just another small town boy to be crushed beneath the shoes of the great child genius.
- Peter Sanderson: Nothing I could have done to you, nothing warrants what you did.
- David: Pain is relative, remember. You can not judge mine.
- Peter Sanderson: [as David moves forward] STAY WHERE YOU ARE!
- David: You still haven't figured it out have you? Tell me Peter... do you still have scars? Scars from where I stabbed you with my fountain pen?
- Kathy Sheppard: I've always wanted to learn how to play chess. It seems like a complicated game.
- Peter Sanderson: Well, not really. You see your goal and go after it. Anything that gets in the way is an obstacle and must be destroyed.
- Kathy Sheppard: Sounds very violent...
- Peter Sanderson: Chess is a reflexion of life, life is violent. The strong win, the weak perish.
- Kathy Sheppard: You enjoy being the stronger one?
- Peter Sanderson: If you're asking me if I'm passionate about what I do, the answer is yes. Without passion, nothing moves us.
- David Willerman: Please, I don't want to get into the psychological aspects of my actions. It would detract from the game.
- Peter Sanderson: How?
- David Willerman: I couldn't say it better than Huxley.
- Peter Sanderson: Well, Huxley's quote also says, "for his play is always fair and just."
- David Willerman: So is mine, within the framework of my rules.
- Grandmater Lutz: You're acting like a superstitious schoolboy, Peter. What's next, incense and Rosary beads?
- Detective Wagner: Oh, we wouldn't want someone's death to interfere with your games. What was your relationship with her?
- Peter Sanderson: Casual.
- Detective Wagner: Casual? You were boning her, weren't you?
- Peter Sanderson: It wasn't serious. What's your problem?
- Detective Wagner: You are. I don't like you.
- Peter Sanderson: Fine, don't ask me out on a date.
- Detective Wagner: Don't worry, I won't. I've seen how your dates end up.
- Peter Sanderson: What is this?
- Kathy Sheppard: I'm just trying to get to know you better.
- Peter Sanderson: By attacking me.
- Kathy Sheppard: Attack you? You set your life up like one of your chessboards. You're impassable. You've become trapped behind your defenses. You're cut off from everybody around you.
- Peter Sanderson: What are you talking about? You don't know me.
- Kathy Sheppard: Does anyone?
- David: You shouldn't have said those horrible things about me... you don't know what I am.
- Kathy Sheppard: [On why the killer attacked her in the asylum] What if he came here because he's really a patient? An out patient?
- Kathy Sheppard: [hysterically] I'm sure your mommy knows that now David... I'm... sur... sure she understands... I mean chil...
- [voice breaking]
- Kathy Sheppard: ... children make mistakes David... it's okay.
- [begging]
- Kathy Sheppard: David... put down the knife now David please... just put down the knife David please...
- [struggling not to cry]
- Kathy Sheppard: David... put down the knife please David?
- [last words]
- Kathy Sheppard: [slowly raises his head and looks her directly in the eyes] I... Can't...
- Captain Frank Sedman: [kneeling beside Wagner, his throat slit] Aw Jesus Andy Ah
- [looks around]
- Captain Frank Sedman: Aw God
- [lowers his head]
- Captain Frank Sedman: SON OF A BITCH!
- Kathy Sheppard: David... David... if you do this you are not going to win! You're gonna lose... AGAIN!
- David: [shakes head] You don't understand why I have to do it
- Kathy Sheppard: [reassuringly] Yes I Do... YES I DO! I found the file David I understand... but this is not going to bring back your mother
- David: [mournfully] My Daddy Left... And My Mommy... There Was So Much Blood... Covered Everything
- Kathy Sheppard: [sympathetically] You Feel Bad... Fo... For Not Helping Your Mommy Right?
- David: [fighting back tears] I Should've Stayed With Her
- [sniffs]
- David: That's Why I Stayed With The Others
- [sighs]
- David: I Cleaned Them... I Washed Them
- [snivels]
- David: So They'd Look Nice When They'd Go See My Mommy
- Kathy Sheppard: [screaming as he attacks Frank] FRANK... FRANK
- [screaming at him]
- Kathy Sheppard: DAVID... DAVID
- [David looks up at her before he takes the razor to Frank]