Just because you're smart and beautiful doesn't mean you have good judgement.

Relationships aren't math problems. You don't solve them by being practical.

Castle: What was your talent?
Martha: The way I wore a sweater.

How come I didn't hear about this on TMZ?

Death of a beauty queen. Scandalous.

You know what I thought when I first met you? You were a mystery I was never going to solve.

Castle: This is so weird, I dressed up as him for Halloween.
Beckett: I did too.

Castle: Worried you can't control yourself when we're alone?
Beckett: It's not me that I'm worried about.

Castle: Thank you.
Beckett: Always.

I want you all to myself. If that makes me petty, so be it.

Castle to Beckett

Captain: She's like a tiger in there, I never get tired of watching her.
Castle: Me either.

He was out playing grand theft auto.

Castle Quotes

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

Castle

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.

Rick Castle