Beckett: So what, you're Prince Charming now?
Castle: If the shoe fits.

Looks like we've got a fairy tale killer on our hands.

Red Cloak. In the woods. Animal attack. She's Little Red Riding Hood!

I feel like my whole life is being invaded.

Clara started out like Sophia but ended up more like you.

Castle: I thought you were the bad guy?
Gage: If I were the bad guy, you would be dead by now.

Castle: How did you get here?
Sophia: I'm CIA.

Beckett: So you slept with her?
Castle: Yea, yeah I slept with her.
Beckett: Have there been others? Muses?
Castle: No.
Beckett: Just wanted to see how big the club was.

That whole sinking car thing is much cooler in movies than in real life.

I guess the good thing about having your daughter at crime scenes is that she can bring you dry clothes.

Life is a journey

Castle: I found something.
Beckett: Shouldn't you tell Sophia about it?
Castle: She's not my partner. You are.

Castle Quotes

Beckett: Wait, there's a sex scene in the book? Between us?
Castle: There's a sex scene between Nikki Heat and the roguishly handsome reporter who's helping her.
Beckett: Oh, good. So he's nothing like you.

So how did she take it, us being together?

Beckett