Howard: The man impersonating a bear would like you to know that, "Only you can prevent forest fires."
Raj: I don't get it.
Howard: You didn't have Smokey the Bear in India?
Raj: No. Was he anything like Munmun the Mongoose? He taught us not to play with cobras.
Howard: You had to be taught not to play with cobras?
Raj: You had to be taught not to burn down the forest?

Bernadette: Maybe we should get one of those machines to help her up the stairs.
Howard: You mean a forklift?

Penny: [to Raj] Run to India.

Penny: [on the phone] No, mom. It's the same guy I've been going out with for the past two years. Yeah, the scientist. Well, it's complicated. He works with lasers and atomic magnets. No, I did not see it coming. No, we have not set a date. No, I am not pregnant. Yeah, this is a first for our family.

Raj: [to Amy] If you were having Sheldon's baby, would you really want him in the room?
Penny: Yeah, if he's in the room when they're making the baby, I'll give you $10.

Leonard: That's two proposals, one day. Sounds like someone wants to spend the rest of their life telling people how to spell the name Hofstadter.

Leonard: Oh, I know. This might help. *Gets a ring out of his wallet*
Penny: Where did you get a ring?
Leonard: I've had it for a couple of years. Not important. Penny, will you marry me?
Penny: Oh, my God, yes.
Leonard: This would have been so much more romantic if you didn't have monkey hair on your finger.

Leonard: Okay, listen to me, this is just a minor setback.
Penny: No, it's not, okay? I've been out here for, like, ten years. I've nothing to show for it.
Leonard: Well, you have me.
Penny: You're right. I do have you. Mm. Let's get married.
Leonard: What?
Penny: Ooh. Leonard Hofstadter, will you marry me?
Leonard: Um…
Penny: Did you seriously just say um?
Leonard: Look, you know I love you but, but you're, you're drunk and sad and feeling lost.
Penny: Okay, so, so you don't want to marry me?
Leonard: That is not what I said.
Penny: No, forget it. I take it back. Offer's off the table.

Amy: (Talking about "It's A Wonderful Life") It's great. It's Christmas time, and Jimmy Stewart's really depressed and he's gonna jump off a bridge and kill himself.
Stuart: Don't need to see it, living it!

Penny: Translation?
Leonard: Wah, I don't want a table.

Bernadette: How do I put this? She's been known to call you a name that usually applies to a lady part. Or a cat, or a willow.
Leonard: I can't believe she would say that about me.
Bernadette: If you're gonna cry about it there's tissues in my purse. Unless you got some in yours, big willow.

Penny: Wow, I can drink a beer underwater!

Howard: Have you ever played a game with Bernadette?
Amy: No.
Howard: Have you ever gone into a steel cage with a wolverine?

Bert: It's okay. I know I'm a monster.
Amy: No, Bert, come on. I'd love to go to the mineral show with you.
Bert: Sweet. It's a date. (Leaves Amy's office)
Amy: No, it's not.
Bert: Too late!

Bert: Thanks for coming to the mineral and rock show with me.
Raj: We’re sorry Amy didn't want to go.
Howard: Really, really sorry.
Bert: Eh. Who needs her when I have you guys? Rock show! Rock show! Rock show! Rock show! Rock show! Rock show! Rock sho-o-o-o-ow!