Mary Cooper: There's a lot of traffic. Are we gonna be okay?
Amy: You'll be at the airport an hour before your flight.
Mary Cooper: Good. Thank you.
Sheldon: Plenty of time for you to meet another geriatric boy toy.
Mary Cooper: Hey, I will not have you be disrespectful to me.
Sheldon: Yes ma'am.

Sheldon: Well, this is confusing for me. But I don't want to stand in the way of your happiness. So, I will condemn you internally while maintaining an outward appearance of acceptance.
Mary: That is very Christian of you.

Mary Cooper: When your mom gets back, I'm gonna need to apologize for the way I spoke to her.
Penny: Well, come on, she did kinda start it.
Mary Cooper: Doesn't matter. A good Christian would have turned the other cheek. On the other hand, a good Texan would have shot her, so I'll just split the difference.

Mary: He gets his temper from his daddy.
Leonard: Ah!
Mary: He's got my eyes.
Leonard: I see!
Mary: All that science stuff, that comes from Jesus.

Raj: Can we take a moment to discuss that I just lied to the government for you?
Howard: Yeah, I would not have done that for you.

Leonard: Penny, as a scientist, my job is to figure out why things happen. But I don't think I'll ever understand how someone like me could get to be with someone like you. You know maybe I don't need to understand it, I just need to be grateful. I love you, Penny.

Sheldon: Do you think your father's doing unspeakable things to my mother?
Leonard: No.
Sheldon: Are you saying that because the things are unspeakable?
Penny: Your parents are old. Anything unspeakable was finished by 9:30.