Leonard: That's nice that they're getting along.
Raj: Your girlfriend and your ex-girlfriend are hanging out together? Oh, yeah, that can only be good for you.
Leonard: What are you talking about?
Raj: One of them broke up with you. Do you really want her telling the other one why?
Leonard: I don't care. I don't have anything to hide.
Raj: Good, good. Then you have nothing to worry about.
Leonard: No, I do not. You are a mean little man.

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.

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

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: Oh, what fresh hell is this?
Biosuit Nurse: Wait, you can't leave here, you've been exposed.
Sheldon: (Covering his face with his shirt) No, I haven't. It's all good.

Howard: Hell hound.
Raj: Who let the satanic dogs out?

Raj: Sheldon, that's my water.
Sheldon: Oh, dear Lord!
Leonard: That's not your water.
Raj: I know.