Penny: I'll tell you what happened. (sigh) We were young. We were very much in love, but we could only communicate through a time-travelling mailbox at my lake house.
Sheldon: It's not enough that you made me watch that movie, but now you mock me with it?

Leonard: You hacked my Facebook account?
Sheldon: Oh, it's hardly hacking when you use the same password for everything, Kal-El.

Sheldon: Well, this is very pleasant.
Leonard: I'm glad you're enjoying yourself.
Sheldon: And you said there would never be enough pasta for the three of us.

Sheldon: What's your favorite fruit?
Stephanie: Strawberries.
Sheldon: Mmm, technically not a fruit, but all right.

Sheldon: I spent so much of my childhood at that hospital. When I was 12, I got to ride there in a helicopter.
Stephanie: What? What happened?
Sheldon: Radiation burns. A little mishap while I was building my own CAT scanner.
Stephanie: I'm sorry, you tried to build your own CAT scanner?
Sheldon: No, I didn't try, I succeeded.

Sheldon: If you fail at this relationship, and history suggests you will, then we risk losing the medical officer that our landing party has always needed.
Leonard: What landing party?
Sheldon: You're Kirk, I'm Spock, Wolowitz is Scotty, Koothrappali is the guy who always gets killed. And now we've got McCoy.

Sheldon: This is banana bread.
Penny: This is a door knob.

Howard: Don't spritz him with that body spray from the commercials where the women undress when they smell it? That doesn't work at all. No matter how much you put on.

Leonard: I'm bleeding!
Sheldon: Like a gladiator.

Sheldon: I'd like to have a talk about relationships.
Raj: You were supposed to have the talk with him.

Sheldon: Penny, hello.
Penny: Hey, Sheldon.
Sheldon: What is shaking?
Penny: I'm sorry?
Sheldon: It's colloquial, a conversation opener. So, do you find the weather satisfying? Are you currently sharing in the triumph of some local sports team?
Penny: What's wrong with you? You're freaking me out.
Sheldon: I'm striking up a casual conversation with you. S'up?
Penny: Please don't do that.
Sheldon: All right, But I'm given to understand that when you have something awkward to discuss with someone, it's more palatable to preface it with banal chit chat.
Penny: So, this wasn't the awkward part?
Sheldon: No.

Sheldon: In fact, I was briefly able to see the inside of my sister's guinea pig, Snowball, before he caught fire. It led to an interesting expression in our house, not a snowball's chance in a CAT scanner.

Leonard: Do you understand that this was supposed to be a date?
Sheldon: I do. Do you? Because frankly, you've been in a foul mood since I sat down.

Sheldon: Hi, Stephanie. I'm sorry I'm late, but your companion left the most indecipherable invitation.
Leonard: What invitation?
Sheldon: "We're going to the movies." What movie? What theater? What time? If you were trying to make it impossible to locate you, you couldn't have done a better job.
Leonard: Oh, clearly I could have.
Sheldon: It took me nearly 20 minutes to go through the browser history on your computer to see what movie times you looked up.

Sheldon: This is Stephanie's Facebook page. Now, where it should say in a relationship, what does it say?
Leonard: Stephanie Barnett is single.
Sheldon: Yeah, furthermore, earlier this evening, she threw a digital sheep at some guy named Mike. Who's Mike? Why does he get a digital sheep and not you?