She's dead really only has the one meaning.

Sophia: You can go ahead and answer that.
Beckett: Yeah, I was planning to.

You too, Castle. I don't need you playing Nancy Drew on this.

Captain

Just know that I love you. I've always loved you. Always.

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

It's Canada. How risky could it be?

That's so sweet. You want me to outlive you?

Beckett

Beckett: Do you want to grab a bite to eat?
Castle: Actually, it's not food I'm craving.

Who's going to be your bomb buddy?

I don't want to lose what we have.

Beckett

Hey Castle Jr., can you start acting like a cop?

Esposito

I need time to stop being mad and you need time to figure out a way to be OK with this.

Alexis

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