The Halloween season is an exciting time for fall television, especially when your favorite series sync up with the holiday. Sometimes shows culminate their own spooky traditions (How I Met Your Mother's 'Slutty Pumpkin,' Roseanne's homemade haunted houses) and other times, it's a chance for programs to invoke bizarre scenarios (My So-Called Life's school lock-in) that frame some of the weirdest episodes in special circumstance TV history. Tonight, Castle tries to spread the holiday fear by incorporating vampires and werewolves into one of ABC's best mystery cases yet. »

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