Howard: But you know what wasn't a party? That hotel in Kazakhstan they put you up in before the launch. I mean, it's your last night on Earth. You'd think you'd get one porn channel.
Leonard: Have you noticed that Howard can take any topic and use it to remind you that he went to space?
Sheldon: Interesting hypothesis. Let's apply the scientific method, perform an experiment.
Leonard: Okay. Hey, Howard, any thoughts on where we should get dinner?
Howard: Anywhere but the Space Station. On a good day, dinner was a bag full of meat loaf. But, hey, you dont go there for the food, you go there for the view.
Sheldon: It's fascinating. Let me see if I can duplicate the result. Howard, I've always thought the lemon was an underrated fruit. Care to weigh in?
Howard: Not really.
Sheldon: Oh, well.
Howard: You know, people say the Soyuz capsule was a lemon. But, hey, that baby got me to space and back.

Amy: Ladies night at the Cheesecake Factory. Does it get any better than this?
Penny: I hope so.
Amy: Question. Do you think your husband's fondness for turtlenecks is an expression of longing for his missing foreskin?
Penny: It's not getting any better.

Penny: Ugh, it's Leonard. He wants to go costume shopping later.
Bernadette: I thought you liked Halloween.
Penny: I do, it's just he wants to go to that party at the comic book store. A lot of the guys that hang out there are kind of creepy.
Bernadette: Like my husband?
Amy: And my boyfriend?
Penny: I'm-I'm sorry. Amy, you were saying something about Howard's foreskin?

Penny: I guess I could probably try a little harder.
Bernadette: You could start by taking an interest in his work.
Penny: Yeah, that's kind of a problem.
Amy: Why?
Penny: Not really clear on what he does.
Bernadette: He's an experimental physicist.
Penny: Yeah, I'm not really clear on what that means.
Amy: He takes hypotheses and designs protocols to determine their accuracy.
Penny: Yeah, you're really just making it worse.

Amy: So, listen, Sheldon, I was thinking, since this is gonna be our first Halloween party as boyfriend and girlfriend, I thought it might be fun for us to go in a couples costume.
Sheldon: I couldn't agree more.
Amy: Really? I find that inconsistent with everything I know about you.

Amy: Sheldon, when I said couples costume, I meant like Romeo and Juliet or Cinderella and Prince Charming, not two robots from some silly movie I don't even like.
Sheldon: Okay, I'm gonna let that slide because I know you're hopped up on tea bags.

Leonard: Oh, no, no, no, don't look in there.
Penny: What, is it secret?
Leonard: No, it's a nitrogen laser. It'll cook your eyeball like a soft-boiled egg.
Penny: Oh. You might want to put a sign on it.
Leonard: Sign right there.
Penny: Ah. Danger. Sure, sure.

Penny: What's-what's that?
Leonard: Uh, that is an integrated ion trap and time-of-flight mass spectrometer.
Penny: Wow. High-techie-techie. What's this little box?
Leonard: That is a pencil sharpener.
Penny: Ooh, low-techie-techie.

Penny: So, what are you working on right now?
Leonard: It's actually pretty neat.
Penny: Yeah?
Leonard: Yeah. It's a front-projected holographic display combined with laser-based finger tracking. Here, I'll show you. We'll just put this pencil over here.
Penny: Sharp. Thanks to the machine we saw earlier.

Leonard: And then a laser will map the reflective surface, and voila. (A floating 3-D image of the pencil appears. Leonard moves it around with his finger)
Penny: Wow. That is amazing.
Leonard: You know, there's a foundational idea in string theory that the whole universe may be a hologram.
Penny: What do you mean? (Leonard flicks a switch. The hologram changes to a view of the planet Earth). Oh, wow!
Leonard: Uh-huh. Well, the holographic principle suggests that what we all experience every day in three dimensions may really (changes projection to the solar system) just be information (changes the projection to the galaxy) on a surface located at the farthest reaches of our cosmos. (Sets the galaxy spinning) So it's possible that our lives are really just acting out a painting on the largest canvas in the universe.
Penny: Hmm.
Leonard: What?
Penny: Sometimes I forget how smart you are.
Leonard: You should visit more often.

Raj: Before I forget, I'd like your opinion on the menus I've prepared for the Halloween party. The theme is "Food That Goes Bump in the Night".
Howard: "Creature from the Black Forest Ham Lagoon".
Raj: On sesame seed bunzillas.
Sheldon: "Night of the Living Garlic Bread"?
Raj: It's funny because bread sounds like dead.
Sheldon: I'm sorry, but these are just ordinary foods with the names bent into tortured puns. The dishes themselves are in no way Halloweeny.
Raj: Ooh, Hallo-weenies! That's a good one. They'll pair nicely with my "Draculoni and Cheese". How do I do it?

Howard: That reminds me, I was thinking about wearing my NASA jumpsuit as a costume. But then I realized everyone would be, like, where's your costume? Why are you wearing your work clothes, you nut?

Leonard: Hello, boys.
Sheldon: What are you smiling at?
Leonard: Nothing.
Howard: You know where's there's a lot of nothing?
Everyone: Space.

Howard: Boy, it's nice to sleep in a bed with gravity again. Did I tell you about the night my retainer floated out of my mouth and into the air lock?
Bernadette: Yeah, you mentioned it once or twice.

Howard: So, here we are, just a couple of young newlyweds. What to do? What to do to you? Astronaut Wolowitz, reporting for booty. Preparing thrusters. We have liftoff. Are we clear to jettison that nightgown?
Bernadette: Okay, we need to talk.