I don't watch Castle but I can sympathize with your feinelgs because a good chunk of Season 2 of Hawaii Five-0 has been sacrificed for bizarro reasons. And to relate what I mean directly to writing stories, I would add this rule:Never add a character to your story who doesn't have a valid reason to be there (and having the character just because you feel a compulsion to ram the character down the viewer/reader's throat is NOT a valid reason.)Like? 0