Leonard: Why are you pretending to be outdoors? You hate it.
Sheldon: Oh, Amy showed me a compelling study that demonstrated the cognitive benefit of spending time in the wilderness.
Leonard: Buddy, I am ready to drive you into the wilderness any time you want and leave you there.

Wolowitz: So, how'd it go with Leslie?
Leonard: Oh, we tried kissing, but the earth didn't move. I mean any more than the 383 miles it was gonna move anyway.

Leonard: Where's my Bat Signal?
Penny: You have a Bat Signal?
Leonard: I did. It was right here. She must have- Oh, my God, we're living together.

Penny: I don't know what to say.
Leonard: Don't say anything. ... I mean you could say thank you, I did just buy you a car.

Sheldon: Besides, a bar is where I belong. I'm having female problems.
Leonard: If you're cranky and retaining water, I have a theory.

Penny: How long was it?
Leonard: 94 seconds.

Sheldon: (Knocking) Leonard? Leonard? Leonard?
Leonard: Let it go, Sheldon. The murderer was the first mate whether it made sense to you or not.

Penny: It's just this is only our first date.
Leonard: Well, why don't we just figure out where we're going, and when we want to get there, and then rate of speed equals distance over time, solve for 'r'.
Penny: Or we could just wing it.

Leonard: Penny and Leonard 2.0. We can test it internally, shake out the bugs, and if we both think it is solid, we roll it out to the public.

Leonard: Okay, I have just one question for you. While I am perfectly happy with the way things are between us, you said that you didn't wanna go out with me because I was too smart for you. Well, news flash, lady: David Underhill is 10 times smarter than me. You'd have to drive a railroad spike into his head for me to beat him at checkers. Next to him, I'm one of those sign-language gorillas who knows how to ask for grapes. So my question is what's up with that?
Penny: (tearfully) Why are you yelling at me?
Leonard: Sorry, I'm sorry, I'm sorry. Never mind, we're cool.

Howard: New pants?
Leonard: Yeah, Stephanie got them for me.
Howard: Nice. Cotton?
Leonard: Actually, I think it's more of a wool-fire ant blend.

Sheldon: Can you believe my mother thinks we're both strange?
Leonard: (loudly) Absolutely not!
Penny: (whispering) That's too loud.
Leonard: (quietly) Absolutely not.

Sheldon: So, your convention is in San Diego, right?
Penny: Yes.
Sheldon: Great. I need you to settle a bet for Amy and me.
Amy: I say, when it's not Comic-Con, no one will be dressed as superheroes.
Sheldon: Mm-hmm. And I say fewer people will be dressed as superheroes but still some.
Amy: A crazy person in a cape doesn't count.
Leonard: Mm, why not? It counts at Comic-Con.

Penny: There's the little family!
Raj: Hello.
Stuart: Hello.
Leonard: And their Sherpas.

Leonard: "Article 10, subsection C: If questioned, Penny may not say that everything is fine if it isn't.
Other unacceptable responses include: 'It's nothing', 'Don't worry about it', and 'I said it's nothing, don't worry about it'."