Sheldon: She's always been a huge fan of my work, and now she's doing research at Caltech.
Amy: Huge fan, you say?
Sheldon: Yes. I think you'd like her. She's extremely intelligent, just like you. Unlike you, she's tall, blonde and used to be an Olympic swimmer.

Sheldon: And get this, I saw an articulating ladder with dual-leg leveling, which delivers stability and adaptability to uneven terrain.
Amy: Sounds like a big night.
Sheldon: Yeah. Raj made the funniest joke, he said, "Which is the best ladder to use to hang myself?"

Penny: We thought you meant not letting him run out into traffic.
Bernadette: Which he only did once.

Penny: Well, what do you want us to do?
Amy: I don't know. Might be the New Jersey talking, but this Nowitzki broad needs to disappear.

Amy: Why didn't you tell me?
Bernadette: We didn't want you to worry.
Amy: Should I worry?
Penny: No, come on, it's Sheldon. Nothing is gonna happen.
Amy: That's what you said to me when I started dating him. And then five years later, bingo-bango, something happened.

Penny: Not only did they eat together, Leonard said he made her laugh.
Bernadette: That's nothing, Howie said she touched his hand.
Penny: Did he Purell?
Bernadette: No.
Penny: I cannot believe Leonard mentioned the Toblerone but left that part out.

Penny: All right, then we agree. He's not making any moves, it's this Dr. Ramona chick.
Bernadette: Nowitzki. I Googled her, she's pretty cute.
Penny: Really? All I got from Leonard was the Toblerone bar had nuts.

Leonard: He just made her laugh, something's wrong.
Raj: Do you see the way she's looking at him?
Howard: Yeah. Like Bernadette used to look at me.
Raj: I keep telling you, close the bathroom door.
Leonard: Ah, did you see that? She just touched his hand and he didn't swat it away. What is happening?
Howard: Okay, the simplest explanation is usually the right one.
Raj: Which is?
Howard: That ain't Sheldon.

Penny: Do you think living with Amy has somehow stirred up Sheldon's sexual appetite?
Bernadette: (grimacing with disgust) Ugh. How can you think that? Why would you even put those words together?

Sheldon: So, tell me about your scalar dark energy experiment.
Ramona Nowitzki: Not 'til you tell me about your latest paper on quantum loop theory.
Sheldon: Oh. You must be one of those dessert before dinner people.

Howard: If you'd like, we can help you out.
Leonard: Oh, that would be great.
Howard: I mean, not me, I've got a wife and child, but this one posts video of himself flossing on Instagram.
Raj: It was a tutorial. And yes, I'm happy to keep Sheldon company.

Leonard: Tonight he wants to look at ladders at Home Depot.
Raj: Oh, why does he need a ladder?
Leonard: He doesn't; he just likes looking at them. Bring a book.

Sheldon: Gentlemen, you may remember Dr. Nowitzki. She's back at Caltech for her postdoc.
Leonard: Hello.
Ramona Nowitzki: Hello.
Raj: Hi. Oh, let me bring a chair for you.
Sheldon: Oh, thanks. Dr. Nowitzki's going to tell me about the work she did at CERN. And she brought me this duty-free Toblerone.
Leonard: Oh. I love those.
Sheldon: (To Ramona) Let's sit somewhere else.

Leonard: Wait, isn't she the grad student that used to follow him around?
Howard: Oh, yeah. Back before he hit puberty and grew man parts.

Howard: How's Sheldon doing with Amy gone?
Leonard: Well, the last three nights I've had to take him to get a haircut, to the train store, and to a Walgreens in Arcadia where they still have the "good ibuprofen." Now, ask me how I'm doing with Amy gone.
Raj: How are you doing with-
Leonard: Shut up.