Sheldon: Mmm, mmm, mmm.
Penny: I'm so glad you like it.
Sheldon: I do. Leonard never cooks for me.
Penny: Well, maybe that's 'cause Leonard can't cook.
Sheldon: You can't cook and you made me this.

Sheldon: I got lost.
Leonard: How could you get lost? Your phone has GPS.
Sheldon: Satellites are down. Solar flares.
Raj: There are no solar flares right now.
Sheldon: Yes, there are.
Raj: Dude, I'm an astrophysicist. If there were solar flares, I'd be all up in it.

Leonard: Oh, just come in!
Sheldon: Thanks for seeing me on such short notice.
Leonard: What do you want, Sheldon?
Sheldon: Maybe this isn't a good time.
Leonard: Tell me why you woke me up or I swear to God I will kill you.
Sheldon: Do you really think death threats are an appropriate way to begin this conversation? Sometimes your lack of social skills astonishes me.

Sheldon: And now, as promised, the tangent. "Sheldon and the Hell Hound", or "How I Lost My Hot Dogs".

Penny: Is there anything else?
Leonard: Yeah, don't let Goofy near him. He'll have nightmares and I'll have to deal with it.
Penny: What's the problem with Goofy?
Leonard: Wish I knew. He's fine with Pluto.

Raj: Hey, do you think the elastic woman in The Incredibles needs to use birth control or can she just be a diaphragm?
Howard: Well, that's it. We're officially out of things to talk about.

Penny: He's such an angel when he's asleep.
Leonard: Yeah. Shame he has to wake up.
Penny: I think we can do it.
Leonard: Smother Sheldon in his sleep? Wouldn't that be wrong?

Sheldon: Oh, Leonard, I have something for you. Per our roommate agreement, this is your 24-hour notice that I will be having a non-related female spending two nights in our apartment.
Leonard: When you say non-related female, you still mean human, right?
Sheldon: Of course. Pets are banned under the roommate agreement, with the exception of service animals, such as seeing eye dogs and, one day, cybernetically enhanced helper monkeys.

Leonard: Why is a world-renowned scientist staying in our apartment instead of a hotel?
Sheldon: Well, she doesn't care for hotels. And who can blame here? Windows that don't open, multi-user linens, keys shaped like credit cards, as if one walks around with unassigned slots in one's wallet.

Sheldon: A word of warning. My guest is a noted physicist and the leading expert on quantum cosmology, so please try to avoid wasting her time with female jibber jabber.
Penny: Female jibber jabber?
Sheldon: Shoe sales, hair styles, mud masks, gossip about your friends Brad and Angelina.
Penny: Oh, they're not my friends.
Sheldon: I'm not surprised, considering the way you talk about them behind their backs.

Sheldon: In here you'll find emergency provisions. An eight-day supply of food and water, a crossbow, season two of Star Trek: The Original Series on a high-density flash drive.
Elizabeth: What if there's a disaster that destroys all the USB ports?
Sheldon: Then there's really no reason to live, is there?

Raj: Guys, help me.
Howard: Sheldon, come on.
Leonard: Yeah, it's just one sneeze. (Raj sneezes again) You're on your own.
Howard: See you, buddy.

Raj: The cosmological physicist from Princeton?
Sheldon: Yes. And until you acquire a surgical mask, please address your comments to me through a napkin.

Leonard: Why didn't you tell me you knew Elizabeth Plimpton? I am a huge fan of hers!
Sheldon: I didn't realize I was obligated to share my connection with things you're a fan of, but very well. You enjoy Canadian bacon. I've been to Toronto.

Raj: When can I sit with you again?
Sheldon: When I've seen two consecutive negative throat cultures spaced 12 hours apart. You know the drill. All right, if you'll excuse me, I am off to start a prophylactic course of antibiotics.