Amy Farrah Fowler: If Sheldon ever proposed to me during sex, my ovaries would hang on to him and never let go.
Amy Farrah Fowler: Did I ever tell you that you look like a sexy praying mantis?
Sheldon Cooper: Yes, every time you drink alcohol.
Amy Farrah Fowler: The fascinating thing about praying mantis, they eat their mate.
Sheldon Cooper: So?
Amy Farrah Fowler: [Undoes the top button of her blouse] Dessert is served.
Sheldon Cooper: I just had cobbler.
Amy Farrah Fowler: [Buttons back up] That's it. I'm done. I'm leaving.
Sheldon Cooper: Amy, don't go. I need you.
Amy Farrah Fowler: You do?
Sheldon Cooper: Of course. You're my ride.
Amy Farrah Fowler: Sheldon, either you say something meaningful and from the heart, or you and I are through.
Sheldon Cooper: Very well. Amy, when I look at your eyes and you're looking back in mine, everything feels not quite normal. Because I feel stronger and weaker at the same time. I feel excited, and at the same time, terrified. The truth is, I don't know what I feel, except I know what kind of man I want to be.
Amy Farrah Fowler: Sheldon, that was beautiful.
Sheldon Cooper: I should hope so. It's from the first Spider-Man movie.
Amy Farrah Fowler: I'll take it.
Howard Wolowitz: Mom, everyone at NASA can hear this call.
Mrs. Wolowitz: Good! They can hear what a horrible son you are!
Howard Wolowitz: Okay, nice talking to you! Goodbye!
Howard Wolowitz: Well, space is ruined.
Amy Farrah Fowler: I can't believe my upper lip will be the same color as my fake blond friend.
Penny: Hey! This is my natural color... now.
Bernadette Rostenkowski: Howard, either you tell your mother or that thing I said I would do to you when you got back, you can do to yourself.
Dimitri: Like he's been doing since he got here.
Raj Koothrappali: Isn't this romantic?
Sheldon Cooper: I hope that's a rhetorical question, because I don't know.
Dimitri: You realize you just lied to your wife and your mother.
Howard Wolowitz: Of course.
Dimitri: What are you going to tell them when you get back to Earth?
Howard Wolowitz: Oh, I am never going back.
Stuart: So, Howard's really in space?
Leonard Hofstadter: Yup, in the International Space Station. 2700 miles that way.
Raj Koothrappali: Right now he might be looking down on us like a tiny Jewish Greek god. Zeusowitz.
Sheldon Cooper: I must admit I do feel a tinge of envy. Howard is looking out at the majesty of the universe passing before his eyes. His dim, uncomprehending eyes. Like a cat in an airport carrying case.