Johnny Galecki credited as playing...
Leonard Hofstadter
- [Sheldon's hot twin sister, Missy, is in town for a wedding]
- Leonard Hofstadter: If the wedding's not until tomorrow, why don't you stay with us tonight?
- Missy: Oh, I don't think so. Shelly doesn't like company. Even as a little boy, he'd send his imaginary friends home at the end of the day.
- Sheldon Cooper: They were not "friends". They were imaginary colleagues.
- Penny: So, Sheldon's sister is pretty cute.
- Leonard Hofstadter: I wasn't staring!
- Penny: I didn't say you were; I just said she was cute.
- Leonard Hofstadter: Oh! Uh, maybe... if you like women who are tall... and perfect.
- Howard Wolowitz: You have Penny.
- Leonard Hofstadter: I don't have Penny. In what conceivable universe do I have Penny?
- Howard Wolowitz: So I can have her then?
- Leonard Hofstadter: No!
- Leonard Hofstadter: On the other hand, some physicists are concerned that if the supercollider actually works, it will create a black hole and swallow up the earth ending life as we know it.
- Raj Koothrappali: What a bunch of cry babies. No guts, no glory, man.
- Leonard Hofstadter: Maybe she's his lawyer.
- Howard Wolowitz: Well, she's free to inspect my briefs.
- Leonard Hofstadter: Howard...
- Howard Wolowitz: I know, I'm disgusting. I should be punished. By her. Oh, look, I did it again.
- Leonard Hofstadter: [sees a crowd outside Sheldon's office] What's going on?
- Howard Wolowitz: Shhh. Hot girl in Sheldon's office.
- Leonard Hofstadter: Sheldon's office? Is she lost?
- Howard Wolowitz: I don't think so. I followed her here from the parking lot.