I forgot how Gwen even resigned from her job as a cop and maintain an easy, breezy, relationship with the police department. I know Andy questioned her so I'm probably blanked it out of my memory.*shrugs*

Castle: “‘Don’t leave town?’ Don’t you need probable cause for something like that?”
Beckett: “Only he doesn’t know that, does he?”
Castle: “You can lie like that? That is so coooool!”.

How many ways can you spin a detective show? Answer? It doesn't matter, what matters is the characters and long story arches. Not really the whodunits.