That's the thing about luck, it changes.

Mr. Turner

You're a good cop, but I think you can do better if you minimize your distractions.

Gates

Besides Detective, I'm looking forward to seeing what you can do without him.

Gates

Women. Are you sure you want to spend the rest of your life with one?

Esposito

I know you mean well, but I don't think going out with my dad is going to make me feel better.

Alexis

It's almost like the thought of marriage fills him with an impending sense of doom. Oh wait, that's me!

Let's not let a little thing like murder get in the way of having a good time.

The last time I saw you in your pj's after eight am I think you were four.

Even as a hostage I help you solve murders. Beckett, I think you have the perfect partner.

If you pull that trigger, I will personally walk through those doors and put a bullet in your skull.

Beckett

Don't you touch him you son of a bitch!

Martha

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

Esposito

Castle Season 4 Quotes

I'm not going to lose her again.

Castle

I know I'm not going to be able to have the kind of relationship I want until the wall comes down. I cant do that until this is put to rest.

Beckett