Penny: Come on, let's just get this over with.
Leonard: "Let's just get this over with?" Am I driving you to the Cheesecake Factory or are we having sex?

Sheldon: Oh apple juice stay where you are.

Howard: How do I know what you said? Damn you and your noise-cancelling breasts.

Bernadette: I said to stop insulting each other. I didn't tell you to take him on a romantic getaway.

Howard: I'm an astronaut and you know it. You just don't like admitting it because you're jealous.
Sheldon: Well, truth be told, as a child I did dream of going to space. Those astronauts were my heroes. And when you got to go, it was hard for me.
Howard: Thank you.
Sheldon: Because it made me realize they'll just send anyone up there.

Howard: What now?
Sheldon: I have to go to the bathroom.
Howard: You just went to the bathroom.
Sheldon: But I didn't use it because it didn't seem safe. Despite all my emails, the toilet didn't have a seatbelt.
Howard: Well, it still doesn't.
Sheldon: I realize that but safety concerns went out the window two apple juices ago.

Bernadette: You excited for Texas?
Sheldon: Oh, very much so.
Howard: It's not everyday you get to tour NASA with a real astronaut.
Sheldon: Ohh, who's the real astronaut?
Howard: ... Buzz Aldrin.
Sheldon: Oh, yay!

Raj: I give you one simple thing to do: contact a complete stranger and make her fall in love with me, and you blow it!

Sheldon: Leonard, could you wrap it up? We're waiting on you.
Penny: I'm sorry, is the fact my life's falling apart interfering with your board game?
Sheldon: It is.
*Sheldon goes back into the apartment*
Sheldon: You were wrong, Friend Howard. She completely understood.

Penny: I called them. The part's gone. They gave it to someone else. Now some girl's going to get discovered and get famous, and go on Letterman and talk about how she got her big break on some cheap monkey movie all because some dumb girl though it was beneath her.
Leonard: At least they talk about you on Letterman.

Sheldon: Remember the old days when I would point out that your check engine light is out?
Penny: Yes.
Sheldon: Well, get ready to stroll down memory lane. Penny, your check engine light is on.

Sheldon: Oh, I'm fine. It's just some stomach medication for my trip. There's a remote yet distinct possibility that I may end up in South America.
Penny: Remember the old days when I would have said something dumb like "Why?"

Sheldon: I have one question. Is this a prank? Where you land in Houston and you've made up wanted posters which have my face with a moustache and a Spanish name, and I get arrested and deported to South America?
Howard: No.
Sheldon: Well I'm glad, because I would not have seen that coming.

Howard: Listen, I was thinking you and I could probably try to be better friends.
Sheldon: Really? I was thinking what we have now is a bit much.

Amy: Then I met Sheldon and look at where we are now.
Raj: You've kissed like once in three years.
Amy: That's true. Do whatever you want.