Oh, the only reason to watch Castle is for Nathan Fillion, and there was extra reason tonight: his Halloween costume.
From the ep:
Castle’s daughter: What exactly are you supposed to be?
Castle: Space cowboy.
Castle’s daughter: Okay, A, there are no cows in space, B, didn’t you wear that like five years ago?
Castle’s daughter: So, don’t you think you should move on?
Castle: I like it.
So do I.