But it was a Hollywood promise; not worth a damn.

I don't think date night counts when it's a candlelit dinner with the Butcher of Guadalajara.

Beckett: You’re such a good son.
Castle: And you’re such a good everything.

As long as I'm with you, I'll go anywhere.

The victim's not going to get any deader.

Beckett: That my man would stop talking about being some skeezy blonde's master and start talking about taking his wife to bed.
Castle: Oh well, I don't need a genie to grant that wish.

Beckett: Time machine?
Castle: Only to go back and fall in love with you all over again.

Castle: I have no need for genies because I already have everything I could ever wish for.
Beckett: Right back at you, handsome.

Got a crime scene right here. My mother just killed the mood.

Contrary to what you three have led me to believe, those women's prisons are nothing like the late night skin-a-max movies.

I'm not making anymore decisions concerning LokSat without Beckett.

Castle: “For Richard - Without your constant stumbles in life the advice in this book would not have been possible.” Constant stumbles?
Martha: Let's not make this about you.

Castle Quotes

Castle: How do you know when you're in love?
Beckett: All the songs make sense.

Sometimes the hardest things in life are the things most worth doing.

Castle