Howard: Hey, what's for dinner?
Bernadette: Meatloaf.
Howard: (half-heartedly) Oh, cool.
Bernadette: Stuart made it.
Howard: (upbeat) Oh, cool.

Howard: You okay?
Bernadette: Of course, why?
Howard: Well, I don't know, you seem a little upset.
Bernadette: No, I'm fine.
Howard: You sure?
Stuart: Why don't you think she's fine? She sounds fine, she looks fine. If I saw her on the street I'd say, "Damn, that girl's fine!"

Howard: Speaking of which, for day care, it'll be easy for me to drop her off, unless you want to do it.
Bernadette: Hmm, guess it should be me.
Stuart: I can't do it; they have a picture of me on file now.

Penny: You know, there was a time I would say "God bless you," and then you would say "If you must invoke an imaginary deity, how about Thor?" And I would say, "How do you know I didn't mean Thor?" And then you would say "Touche," and that there ends the tale of why I no longer say "God bless you."
Sheldon: Well, we have had some fun, haven't we?
Penny: Oh, yeah.

Penny: Hey, since when do you do laundry on a Thursday?
Sheldon: Oh, I had an accident at work, I slipped and fell on my soup sack.
Penny: You know, there was a time I would say "What's a soup sack?" But I'm glad we're past that.

Penny: Are you getting sick?
Sheldon: Of course not. I'm too busy to be sick.
Penny: Well, you're pretty delicate. Maybe you shouldn't be pushing yourself so hard.
Sheldon: I'm fine.
Penny: All right. We'll just pretend that you didn't catch a cold watching Frozen.
Sheldon: That didn't happen.
Penny: You also got a nosebleed watching Up.

Bernadette: It's okay, I'm just being emotional about this. Can you not tell Howard?
Stuart: Well, don't you think it'd be healthier if you told him what's going on with you?
Bernadette: Don't you think it'd be healthier if you had your own apartment, grown man?
Stuart: Your secret is safe with me.

Bernadette: Yeah, I mean, with you and my parents, she's gonna be fine.
Stuart: Ah, of course she is.
Bernadette: And that day care is great.
Stuart: It is. I went to check it out, and they are very cautious about letting strange men with no kids peek in the windows.

Bernadette: Plus, I think I'm setting a good example for Halley, to show her that women can be mothers and still have satisfying careers. Sure, she won't know where I went or if I'm ever coming back. That'll just make the ten minutes between when I get home (voice breaking) and her bedtime even more special.

Stuart: What you working on?
Bernadette: Trying to catch up on office e-mails before I go back.
Stuart: Oh, that's right, maternity leave's almost over. Are you excited?
Bernadette: Yeah, I mean, I'll miss Halley, but it'll be nice to get out of the house, be intellectually stimulated. Go out to lunch instead of, you know, (points to her breasts) being lunch.

Stuart: Oh, thanks again for letting me use your laptop last night.
Bernadette: No problem.
Stuart: Was just doing my taxes.
Bernadette: Okay.
Stuart: Actually, if I could if I could just check one more-
Bernadette: Already cleared the browser history.
Stuart: You're a good woman.

Stuart: Uh, other than burp you or give you a bottle, I don't know what to do right now.

Sheldon: B.R.B. That's short for "be right back." I'm saving so much time!

Sheldon: Ah, I'm back, you got me for eight minutes.
Amy: Sheldon, this is silly. You can't expect us to do quality work with you popping in and out like this.
Sheldon: The coefficient isn't lambda, it's lambda sub one. And over here, you should consider the possibility that the brain itself is in two different quantum states. And lastly, do you have any little soup crackers?

Sheldon: Gentlemen, I've got Amy up and running. Shall we get to work?
Howard: Uh, before we do, what are you wearing, oh, friend who we pretend is normal?