Amy: I study the brain, the organ reponsible for Beethoven's 5th Symphony. Bernadette studies yeast, the organism responsible for Michelob Light.

Leonard: What are you doing here?
Raj: I was sleeping.
Leonard: In my bed?
Raj: Well, I would have slept in my own bed, but it was being used to bring shame to my family and the memory of Gene Roddenberry.

Sheldon: My hands are magic.

Leonard: If I roll down the windows, everything is peachy. If you roll down the windows, you're still not a doctor.

Sheldon: Will you Boozehounds stop that infernal clinking? And the Answer was Elephant.

Leonard: Open the landing bay doors, shuttle craft approaching.

Dr. Koothrappali: We heard there was a tornado in Kansas City, is that close to you?
Priya: No.

Leonard: So, hot in India?
Dr. Koothrappali: Of course it is, it always is. It's India. Now, what do have to say for yourself?
Leonard: Uh, that is a beautiful tapestry.
(Raj's parents look back, Leonard closes laptop)

Raj: Just think of me as a Brown Martha Stewart.

Penny: Can I tell you a secret?
Raj: Yeah.
Penny: I screwed up. Leonard's a great guy. Never should have broken up with him.

Mrs. Koothrappali: I'll sleep so much better when you move back here next month.
Leonard: You're moving back to India?
Dr. Koothrappali: Who's that?
Mrs. Koothrappali: Oh my God! There's someone in your apartment. Call the police in America!

Priya: Oh, hello, Leonard. What a pleasant surprise! Mummy, Daddy, you remember Rajesh's friend Leonard.
Dr. Koothrappali: I thought you said Rajesh was out with his friends.
Priya: He has many friends.
Dr. Koothrappali: Rajesh has many friends?
Mrs. Koothrappali: Why are you lying to us?