Amy: Perhaps you could assuage your guilt through altruism. ... Which word's tripping you up? Assuage or altruism?
Penny: Both.
Bernadette: You'll feel better by doing something nice for someone.
Penny: I actually knew that.
Amy: I never doubted you.

Leonard: If I take it off, Sheldon wins.
Penny: Sweetie, every night you don't kill him in his sleep, he wins.

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?

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

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.