Bernadette: But I thought I'd be more excited.
Dr. Koothrappali: Oh, being excited isn't a guarantee of anything. Rajesh's mother was thrilled when she was pregnant with him. After he was born, she doted on his every move. And you know what happened? He broke her heart, moved halfway around the world, and dates only poor white women. So you never know.

Penny: So, Dr. Koothrappali, long flight?
Dr. Koothrappali: Twenty hours.
Penny: Ooh, that's rough.
Dr. Koothrappali: Not at all. Did you know that when you fly Transcontinental without your wife, you don't pray for the plane to crash?

Dr. Koothrappali: Relax? Easy for you to say. Your mother isn't cleaning out your bank account. Forty years, the woman never cleaned a thing.

Dr. Koothrappali: Hello?
Raj: Hey, Dad.
Dr. Koothrappali: Rajesh. What a nice surprise, calling me on my birthday.
Raj: Yes. That's why I'm calling. And-and what better gift to give you than the gift of marrying an Indian woman, just like you've always wanted.
Dr. Koothrappali: My goodness, Rajesh, this is exciting news. Who is she?
Raj: You tell me.
Dr. Koothrappali: What?
Raj: I want you to arrange a marriage for me. I'm just so tired of being single, and I'm finally just I'm-I'm ready to settle down.
Dr. Koothrappali: I can't just call up some girl's dad and make her marry you. It's-it's not 2015 anymore.

Sheldon: No, I know, but plenty of things are addictive after a single exposure. I mean, crack cocaine, nicotine, Pringles. You know, once one pops one just can't stop.

Howard: It's pretty late. You think I've got time to run some more simulations on the cooling system?
Leonard: Sure, I'm still figuring out the thermo-acoustic expander.
Sheldon: Oh, while you do that I am going to pump cerebral spinal fluid through my brain cells to remove the metabolic by-products of the day's thoughts.
Howard: What?
Sheldon: It's called sleep and it's my bedtime. Nighty-night, y'all.

Penny: Now Sheldon's popular? What is happening?!