You got to watch those silhouettes they can be shifty little bastards.

Beckett: Thanks for having my back in there.
Castle: Always.

Castle: You think I should quit?
Martha: I think you should be honest with yourself about why you're doing this. You had written 22 novels before you met her and you didn't need to spend every day at the police station in order to finish them.
Castle: It's not about the books anymore.

The problem is neither of us are in love.

He's an identical twin who wears glasses. That's the worst disguise since Clark Kent.

You had your hand in my pocket and I didn't even feel it? Do it again!

You want my advice? Never sleep with someone you work with.

Thats what makes Beckett such a great detective. She invests in the victim.

Did I say cool? Make that awesome. Perfect place for a murder.

Undercover. I like it. You might want to pop another button just in case.

Castle [to Kate]

So an ex gambler dumps his life savings on an ex con/ex bookmaker and ends up ex'd out.

He's an incredibly dedicated zombie.

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