Castle: Hey Writers, Don't Piss Off the Fans (or the Bloggers)!
During the investigation of a murdered writer, Castle and Beckett find that there are fans and then there are FANS. The difference between them is that super-fans just may be obsessive enough to kill when the show doesn't go their way.
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Blogging turns deadly in this investigation as an actively 'shipping' blogger makes a pretty convincing suspect for the death of the head writer on Temptation Lane. If the death threats and axe-mailing campaign weren't convincing enough, she's got that wild-eyed look that screams "If you don't believe in my OTP, I'll cut you."
It seems like Beckett is a bit more than passingly familiar with Temptation Lane and Castle isn't that shy to admit to watching General Hospital either. The entire episode is a giant nod to soaps and especially Nathan Fillion's dramatic daytime past (he used to be on One Life to Live; the episode is titled "One Life to Lose"). Guest stars include Cameron Mathison and Rebecca Budig from All My Children, and Corbin Bernsen from The Young and the Restless.
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Unfortunately for Beckett and Castle, everyone from the victim's phony mother to the actors have an incentive to kill her. After whipping out a Hamlet reference, Castle discovers the real murderer and her decidedly not soap-like motive. It ends with an all too familiar warning to writers everywhere: plagiarism really doesn't pay.