Castle: I was raised by a single mother. Hard Kill was how I got my bro time.
Ryan: That explains so much.

This guy is like an evil version of Typhoid Mary.

The Taking of Pelham 123 could not have been his plan.

Good thing I married the fastest gun from the east.

Castle: Which is why we don't approach this like cops. We approach this like writers.
Beckett: So we procrastinate and make stuff up?

I don't know if it comes with the room but there's a naked cowboy shaving in our bathroom.

Daisy Mae: It's a single room with a twin bed.
Castle: That's OK. We're cuddlers.

Saddle up, honey, because we are honeymooning out west. Hee Haw.

So instead of Mai Tais we get murder.

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.

It was six years ago. Your hair was short then, it was adorable.

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

Castle Quotes

I can't help it if you got off by putting things in my mouth.

Beckett

Castle: They're going to kill you Kate, and if you don't care about that, please think about how that's going to affect the people who love you. You really want to put your dad through that? What about Josh?
Beckett: And what about you Rick?
Castle: Well of course I don't want anything to happen to you. I'm your partner, I'm your friend.
Beckett: Is that what we are?
Castle: You know what? I don't know what we are. We kiss and then we never talk about it. We nearly die frozen in each others arms, but we never talk about it. So no, I got no clue what we are. I know I don't want to see you throw your life away.