Leonard: Here's my home number, here's my cell, here's my office, here's my parents' number up in New Jersey, they always know how to reach me.

Raj: "Kandorian dry cleaner-" I give up, you can't have a rational argument with this man.

Raj: Whoa. Humongous man crush, dude.

Howard: Yep. It's officially a bro-mance.

Dave: I don't know how you live next door to that without doing something about it.
Leonard: Actually, science is my lady.

Sheldon: What it is is a cacophonous assault of eucalyptus, bayberry, cinnamon and vanilla. It's as if my head were trapped in the pajamas of a sultan.

Leonard: I've been offering to show you around for a year and a half. You always said you had yoga.
Penny: I never said that.
Leonard: Maybe I heard you wrong. A lot of words sound like yoga.

Leonard: Oh, a gift certificate for motorcycle lessons. Very thoughtful.
Penny: Yeah, and I checked. Not letting the bike fall on you while standing still is lesson one.

Leonard: Oh, then I think you'll appreciate what I got you.
Penny: Okay. 101 Totally Cool Science Experiments for Kids.
Leonard: You know, 'cause you're so into science.