Sheldon: 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 don't want to play with you?
Sheldon: No. Although it's a question I've been pondering since preschool.

Zack: You know, I saw this great thing on the Discovery Channel. Turns out that 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.
Zack: No, I'm almost sure that it was the Discovery Channel. It was a great show. They also said dolphins might be smarter than people.
Leonard: They might be smarter than some people.
Zack: Maybe we can do an experiment to find out.
Sheldon: That's easy enough. We'd need a large tank of water, a hoop to jump through, and a bucket of whatever bite-sized treats you find tasty.
Zack: I don't get it.
Leonard: A dolphin might.
Zack: Oh, I see. You guys are inferring that I'm stupid.
Sheldon: That's not correct. We were implying it. You then inferred it.
Zack: Let's go.
Penny: You know, for a group of guys who claim they spent most of their lives being bullied, you can be real jerks. Shame on all of you.

Penny: Why can't your girlfriend be Wonder Woman?
Howard: She and her lab team are under quarantine. Seems at the Christmas party they were doing Jell-O shots out of petri dishes that used to contain yellow fever.
Penny: Okay, what about your friend Amy?
Sheldon: Amy Farrah Fowler doesn't believe in wearing costumes. She isn't the free spirit I am.

Howard: Check it out. Those guys are breaking into that car.
Leonard: What should we do?
Sheldon: We're the Justice League of America. There's only one thing we can do. Turn around and slowly walk away.