Negotiator, Castle and others in “Number One Fan”

So we're gonna need a code word that tells us that you need help. What, uh...What's your favorite food.

Castle

Oh. Um... Are we talking everyday food or fine dining? If desserts are included, there's-

Beckett

Cheeseburgers. He loves cheeseburgers.

Castle

I do enjoy a good cheeseburger.