Rajesh Koothrappali: You know who'd make a great Professor Proton? Meryl Streep.
Howard Wolowitz: She's not a scientist.
Rajesh Koothrappali: Uh, then explain to me why she has chemistry with literally everyone.
Amy Farrah Fowler: It would be nice if they cast a woman.
Sheldon Cooper: Oh, you've already got Doctor Who and the Ghostbusters. Leave us something.
Howard Wolowitz: Now I'm having a son? I'll have to teach him how to play sports, and-and watch sports and-and-and-and-and-and...
Rajesh Koothrappali: He just ran out of man things. He's in trouble.
Leonard Hofstadter: It's okay. We're all here to help.
Sheldon Cooper: Yes. And this baby will have plenty of manly role models. Now, I'm certain that whatever Bernadette can't teach him, Penny can.
Leonard Hofstadter: Uh, she can pee into a bottle.
Penny Hofstadter: Mm-hmm. Anything with a neck wider than a nickel.
Bernadette Rostenkowski-Wolowitz: We realized that it's a gift, in the sense that we didn't ask for it, and we may not have chosen it...
Howard Wolowitz: And we already have one.
Penny Hofstadter: You know, whenever I find a top I like, I always go back and get a second one in a different color. (pause) Which I hope is not the case with your baby.