- Howard Wolowitz: [Howard joins Sheldon walking down the corridor] Hello.
- Sheldon Cooper: Hello.
- Howard Wolowitz: I see you are dressed as Doc Brown from Back to the Future. May I assume that Amy is going as his wife, Clara Clayton, from Back to the Future Part III?
- Sheldon Cooper: She is.
- Sheldon Cooper: [Sheldon stares at Howard] Did you do something different to your hair?
- Howard Wolowitz: Yes.
- Sheldon Cooper: Looking good.
- [and walked off without realising Howard is dressing up as him]
- Bert Kibbler: Really? An arranged marriage.
- Raj Koothrappali: Yeah, I know how it sounds.
- Bert Kibbler: It sounds awesome. Is that just an Indian thing, or can I get a piece of that?
- Bernadette Rostenkowski: One time my brothers made me breathe helium. I tried to call for help, but the only one who could hear me was the dog.
- Bernadette Rostenkowski: It's hard to be taken seriously when you're always the smallest person in the room.
- Sheldon Cooper: I know that. I was in high school when I was 9 years old. I tried to tell the other kids that although my physical stature was small, my intellectual stature towered over them. That only seemed to make things worse.