Sheldon: As it happens, I'm also spending the day with a beloved children's science personality. Isn't that right, new friend and colleague Bill Nye, the Science Guy?
Sheldon: Sorry, I replaced you with a newer model.

Amy: Should you really be sitting in Sheldon's spot?
Raj: He's in Texas, he'll never know.
Penny: Wouldn't be so sure about that.
Leonard: Yeah, he has a very sensitive butt. Look, it's true. Once I saw him sit on a bunch of loose change and add it up.

Penny: Ooh, I'm going to check the fridge and see if there are any clues inside a beer.

Penny: If you do something cool in science, you might change the world. If I become a famous actress ... I'm not going to tell you why movie stars are the best, they just are.

Sheldon: If I'd known this was about time travel, I'd have watched this much sooner.

Bernadette: Almost there. You're doing great.
Howard: Thanks for lifting my spirits. Next time, try lifting the box.

Sheldon: Oh apple juice stay where you are.

Leonard: You make a lot of sense. I like this table and I'm getting it.
Penny: Really, this one?
Leonard: That one.
*Penny nods*
Leonard: Damn right I like that one.