Penny: Well, I've been thinking, and maybe I'm ready to take things a little faster.
Leonard: Oh, great. And I promise, after waiting four months, fast is what you're gonna get.

Leonard: What would you be if you were attached to another object by an inclined plane, wrapped helically around an axis?
Sheldon: Screwed?
Leonard: There you go.

Leonard: Penny, as a scientist, my job is to figure out why things happen. But I don't think I'll ever understand how someone like me could get to be with someone like you. You know maybe I don't need to understand it, I just need to be grateful. I love you, Penny.

Sheldon: This song is never going to stop. Have you ever dealt with something so relentlessly irritating?
Leonard: That's a trick question, right?

Mr. Rostenkowski: Walnut?
Howard: No, thank you. I'm allergic.
Mr. Rostenkowski: Oh, sure. My partner used to have that. He's dead now.
Howard: From nuts?
Mr. Rostenkowski: Nah, his wife shot him. But she was nuts, so in a way.

Mr. Rostenkowski: It's gonna be okay, son.
Howard: You really think so?
Mr. Rostenkowski: Of course. A pretty girl like Bernadette, she'll find a new guy.

Amy: We're playing doctor. Star Trek style.