Penny: Morning. What’s up?
Leonard: Nothing. We just pulled an all-nighter trying to fix a zero-gravity ... pasta maker.

Raj: If you really want to clean up your karma, go get my freakin' latte.

Howard: Hang on, I think I've got this. Help me see if we can wedge this little piece of PVC behind the support rod.
Sheldon: You're overestimating the tensile strength of the substructure you're building.
Howard: Sheldon, I know what I'm doing.
Sheldon: If you knew what you were doing, there wouldn't be a space toilet where my coffee table should be.

Raj: Howard, wait. Why don't you use this instead of the PVC to keep the transverse filter assembly in place?
Howard: Because this is not a spare part from the space station. This is the thing from the pizza box that keeps the lid from touching the cheese.
Raj: That what that's for? In India, the lid just touches the cheese. Of course, we also have rampant poverty and periodic outbreaks of cholera, so a little cardboard in our cheese is no biggie.

Howard: (talking on the phone) Yes, sir, I understand classified. We'll keep it all classified, no one has to know but you and me.
Penny: What's classified?
Leonard: Howard's space toilet. I'll tell you later.

Penny: Leonard, could you pass the soy sauce, please?
Leonard: I'm sorry, were you talking to me?
Penny: Yeah, I said Leonard.
Leonard: Yes, you did, didn't you?

Penny: What the hell is that?
Howard: Meatloaf.
Leonard: What was it doing on the ceiling?
Howard: That's classified.

Sheldon: I must say, Howard, I think a detailed letter to MIT describing your current circumstances might entitle you to a refund on your master's degree.