Penny: (On the phone) Anyway, I'm really sorry I made fun of your stutter in high school.
Bernadette: You're doing great.
Penny: Uh-huh. Uh-huh. Oh, God, just finish the sentence. Okay, well, I'm sorry you feel that way. Bye. No one wants to hear my apologies.
Amy: I think your mistake is doing it over the phone. If they could look into your eyes, they'd melt.
Bernadette: Penny, it doesn't matter what you did in the past. You're a good person now.
Penny: That's easy for you to say. You weren't just called a b-b-b-b-bitch.

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?

Leonard: Do you think we can outrun him?
Sheldon: I don't need to outrun him, I just need to outrun you.

Penny: Did Sheldon change the Wi-Fi password again?
Leonard: Yeah, it's "Penny already eats our food she can pay for Wi-Fi". No spaces.

Sheldon: I'm not going to say I told you so, but we could have killed him.