Castle: You're right. I do need to grow up. And that's why I'm doing what I'm doing. Everything that's happened happened because of me. And I need to be there for her. I owe her that.
Alexis: Does she make you happy?
Castle: Yeah, she does.
Alexis: Is it enough?
Castle: It's enough for now.
Alexis: Dad. Don't grow up too much, okay?
Castle: (smiles) Hey. It's me we're talking about.