Penny: Are you sure you're not just a little jealous?
Leonard: No. It's just, my way is better, but they won't even consider it.
Penny: Oh, well, it's their loss. Look, why don't you go to bed. I'll run out and get you some medicine.
Leonard: Ah, it's okay. Stuart gave me some when I was at the comic book store.
Penny: Really? You're taking medicine from Stuart? Doesn't he need, like, all of it?

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?

Stuart: Whoa, whoa. You're not gonna cut open a meteor, are you? Have you not learned anything from comic books? Space viruses? Pod people? I sell nothing but warnings.

Bert: I don't really have dreams, when I sleep or in life.

Howard: And then Andy said if we want privacy, we should plant some trees. The only way I know how to do that is to give a dollar and tree shows up in Israel.