When the Bough Breaks

Castle's book agent has gotten him an offer that would be a dream job and could greatly enhance his career. Signing the offer, however, would mean the end of his relationship with Beckett, as he would have to turn away from Nikki Heat, and both Castle and Beckett are realizing a reluctance to do that, even as they work a case that may be their last... a lonely woman whose body was found tossed down a manhole.