The moment we met my life became extraordinary. You taught me more about myself than I knew there was to learn. You are the joy in my heart. You are the last person I want to see every night before I close my eyes. I love you Katherine Beckett and the mystery of you is the one I want to spend the rest of my life exploring. I promise to love you, to be your friend and your partner in crime and life till death do us part and for the time of our lives.

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

Death of a beauty queen. Scandalous.

Beckett: Why do you always have to touch everything?
Castle: I thought you liked that about me.

Wow, apparently you have to be a total hottie just to work here. And I'm saying that as a completely detached soon to be married observer.

Kate, I'm not proposing to you so you'll keep your job or because I'm afraid I'm going to lose you. I'm proposing because I can't imagine my life without you.

Castle: Guys, she wouldn't want you involved.
Esposito: We're already involved. We're family, bro.

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

It's Canada. How risky could it be?

I was in Thailand getting shot at with Chuck Norris?

If I'm anything, I'm discrete.

There is nothing natural about cyanide poisoning.

Castle Quotes

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

Back stabbing, adultery and betrayal. That is why I hate politics.

Kate Beckett