Wil Wheaton: Hey, Sheldon. This is Adam Nimoy.
Adam Nimoy: Nice to meet you.
Sheldon: Oh, it's nice to meet you. I admire your father's work very much.
It's not every day I get to meet someone whose life's journey began in my hero's scrotum.

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.

Sheldon: I am very, very sorry for what I have done. Here's your laundry, I rescind your strikes and you are no longer banished.

Sheldon: Why hast thou forsaken me, O deity whose existence I doubt?

Leonard: At least listen to it through headphones. I'm trying to sleep, good night.
Sheldon: Boy. Taylor was right. Haters gonna hate, hate, hate, hate, hate.

Santa: All right, let me see if I've got this straight. A picture of you on my lap is a way to punish your girlfriend for making you celebrate Christmas?
Sheldon: Correct.
Santa: Santa thinks dating you might be punishment enough.
Sheldon: There's an argument for that, but I want to make sure.

Sheldon: And then the Czech Republic says to Slovakia, I don't think you understand how being broken up works.
Can you believe that? You'd think the Czech Republic would try to hold on to what it did, given it's not as young as it used to be. And I don't see any other countries lining up to invade its southern borders.

Leonard: This isn't so bad.
Sheldon: That's easy for you to say. Your chair isn't facing the lingerie section. Boy that's a lot of panties.

Bernadette: Sheldon, when was the last time you got any sleep?
Sheldon: I don't know. 2 or 3 days. Not important. I don't need sleep, I need answers. I need to determine where in this swamp of unbalanced formulas squatteth the toad of truth.
Penny: Toad of truth? Is that a physics thing?
Leonard: No, that's a crazy thing.

Sheldon: I'm sorry for every mean thing I ever did or said to you.
Howard: I'm sorry too. It's all my fault.
Sheldon: If you weren't my friend there'd be a hole in my life.
Howard: Thank you, Sheldon.
Sheldon: Kind of like when Firefly was cancelled, but not as big.

Penny: I'll pay $1,000 to watch you cut footloose.
Sheldon: This is Penny. She is your friend. If she offers you food, it's safe to take it. You probably paid for it, anyway.

Amy: Think about it. If we had a family there, our kids would be martians.
Sheldon: They would, wouldn't they? We could give them cool martian names. We could teach them about martian history, like who planted those flags or where'd that copy of Mars Attacks come from.

Sheldon: Pay no attention to that man in the bed.

Amy: So, you're just gonna sit here by yourself and do nothing?
Sheldon: Of course not. I'm going to write mean comments about Wil's show online.
Amy: Well, you can't criticize something you haven't seen.
Sheldon: I'm sorry, are you familiar with the Internet?

Howard: Sheldon, some day, if you get a car, I'm sure they'll give you another parking space.
Sheldon: I don't want another parking space. I want my parking space. It's perfect. It's a corner spot, cutting the risk of door-dings in half. It's a mere 28 steps from the building entrance. The nearby tree provides shade on hot days and is also home to a delightful squirrel. Which is fortuitous because most squirrels are real jerks.