'Grimm' Season 3 fall finale spoilers: Bad Christmas and angry gators

"Grimm" is finishing off its first arc of Season 3 with a bang. An epic two-hour fall finale premieres at 9 p.m. Friday (Dec. 13) on NBC, and fans of the series can expect more of what they love in the new episodes. Zap2it had a chance to get an early sneak peek at "Cold Blooded" and "Twelve Days of Krampus," and they're pretty awesome. Here are some early teases to get you excited for tonight's two-hour event. Someone really hates Christmas. Which doesn't work out great, because someone else in the "Grimm" gang really loves the holiday. Expect to see some more personal backstories revealed in "Twelve Days of Krampus." An evil Santa might not be the scariest thing around. This two-part scarefest is putting the emphasis on the legend of Krampus, but honestly, those alligators in the sewer in "Cold Blooded" are pretty darn terrifying. Especially when you're cornered in a sewer with...



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