Castle Review: What Did You Think of Season 5, Episode 6: "The Final Frontier"?

Tonight's episode of Castle can be summed up in one word: shiny! Between the endless Firefly nods and super sci-fi cameos (hello, Principal Snyder!), "The Final Frontier" had us fangirling alongside our resident nerd in hot girl clothes, Detective Kate Beckett. When a Nebula 9 megafan is found mysteriously murdered with a laser beam burn through her chest, KBecks and Rick Castle hit up a sci-fi fan convention to search for the killer. Their investigation leads to some shocking discoveries...


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