Penny: Thank you, I needed to hear that. Why can't Leonard understand it?
Sheldon: Because he's not like us, Penny. We're dreamers!
Penny: Yeah, I need to start cracking the window when I leave you in the car.

Sheldon: Woman, you are playing with forces beyond your ken.
Penny: Yeah, well your Ken can kiss my Barbie.

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.

Penny: I mean, who even reads Scientific American?
Leonard: It's kind of a big deal.
Penny: If it's such a big deal, how come the biggest celebrity they could get for the cover is a molecule?

Bernadette: Hey, Stuart.
Stuart: *startled* Hey.
Bernadette: Sorry, did I startle you?
Stuart: Yes, but at this point pretty much any customer does.

Jesse: You're back.
Bernadette: *Angry voice* Yes, I am. There's a few more things I want to say to you. Stuart's store is just fine. And he's a much nicer person than you are. And if you still have that comic I'd like to buy it right now.
Jesse: No problem. Want a latte while you wait?
Bernadette: No, I don't want a latte. I want a cappuccino and a blueberry scone.
Jesse: I only have chocolate chip.
Bernadette: Well that sounds even better!

Sheldon: Where's my lemonade?
Penny: I didn't get it.
Sheldon: A fitting swan song to your career as a waitress to forget my order one last time.