CASTLE - "Meme is Murder" - When a web celebrity is murdered, Castle and Beckett explore the flashy world of internet fame. But when the killer posts pictures from the crime scene on a photo-sharing site, they realize they are up against a social media sociopath who may strike again, on "Castle," MONDAY, OCTOBER 27 (10:01-11:00 p.m., ET) on the Walt Disney Television via Getty Images Television Network. (Photo by Richard Cartwright/Walt Disney Television via Getty Images)
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