Castle: Tell me, you guys, do you think my hair is thinning?
Beckett: You're not losing your hair, Castle.
Castle: Okay, so if I wake up bald tomorrow, you'll still be attracted to me? (Beckett pauses) Oh, my God. You wouldn't.
Beckett: I didn't say that.
Castle: No, but you were thinking it. I can see it in your ...
Esposito: With that pumpkin head? Dude.