Penny: Hey, you don't need Leonard and his app. You can make one with me.
Sheldon: With you?
Penny: Seriously, I have a great idea for one.
Sheldon: Is it better than your idea to move to Los Angeles and become a famous actress?
Penny: Okay, look. When you see someone wearing shoes you like, you just snap a picture of them, and the app goes on the Internet to find out where you can buy them.
Sheldon: That's your app idea?
Penny: Well, you don't like it?
Sheldon: I didn't say that. But no, I don't.

Penny: Sheldon, I'm gonna make some cocoa. Do you want some?
Sheldon: Do you make it with milk or water?
Penny: Milk.
Sheldon: Real cocoa?
Penny: That's what it says on the packet.
Sheldon: Do you have those little marshmallows?
Penny: No, sorry.
Sheldon: Well, I suppose it's appropriate.
Penny: What does that mean?
Sheldon: A disappointing drink for a disappointing day.

Leonard: Okay, now that you're back on the team, let's get you caught up.
Sheldon: Before you begin, let me say again how deeply sorry I am for my earlier behavior, and how much I respect and admire your leadership.
Leonard: Thank you. So as you can see, not only can you store your favorite equations, but you can forward them to your friends or post them on Facebook right from the app.
Sheldon: Well, I must say, I am impressed.
Leonard: Thanks.
Sheldon: You all have clearly put in a lot of hard work.
Howard: We have.
Sheldon: As a result, you have taken the most important step on the road to success, learning what not to do. Now, let's start fresh. Howard, we're going to need some tea.

Sheldon: I'm not Sheldon. I'm the Flash. And now I'm going to the Grand Canyon to scream in frustration. *takes two quick steps* I'm back.

Sheldon: I'm sorry, but in what universe is Wonder Woman blonde?

Sheldon: I understand why you're upset. You're afraid that costume makes you look fat.

Sheldon: Don't worry. Wonder Woman was an Amazon. And Amazons tend to be very beefy gals.

Zack: You know, I saw this great thing on the Discovery Channel. Turns out if you kill a starfish it'll just come back to life.
Sheldon: Was the starfish wearing boxer shorts? Because you might have been watching Nickelodeon.

Sheldon: Milk Duds, with their self-deprecating name and remarkably mild flavor, are the most apologetic of the boxed candies.

Sheldon: Amy Farrah Fowler doesn't believe in wearing costumes. She's not the free spirit I am.

Zack: You're inferring I'm stupid.
Sheldon: That's not correct. We implied you're stupid, you then inferred it.

Sheldon: Good Lord how you frustrate me Leonard Hofstadter!

Sheldon: (Knocking at Penny's door) Penny! Penny! Penny! Penny! Penny! Penny! Penny! Penny! Penny! Penny! Penny! Penny!
Penny: What the hell is wrong with you?
Sheldon: I'm the Flash, I just knocked 30 thousand times.

Koothrappali: Oh, great. No Superman, no Wonder Woman? All we've got is a skinny Flash, an Indian Aquaman, a near-sighted Green Lantern, and a teeny, tiny Dark Knight.
Sheldon: Obviously, we're no longer a Justice League. We have no choice but to switch to our Muppet Baby costumes.
Koothrappali: Ooh, I call Kermit.
Sheldon: I'm Kermit. You're Scooter.
Koothrappali: Oh, man. Scooter sucks. He's the Aquaman of the Muppet Babies.

Raj: Water Demon.
Howard: Ice Dragon.
Leonard: Lesser Warlord of Kaa.
Sheldon: Not so fast. Infinite Sheldon.
Leonard: Infinite Sheldon?
Sheldon: Yes, Infinite Sheldon defeats all other cards and does not violate the rule against homemade cards because I made it at work.
Leonard: Do you understand why people dont want to play with you?
Sheldon: No, although its a question Ive been pondering since preschool.