Spoiler! More Spoiler Photos of Castle Season 5, Episode 6, "The Final Frontier": Castle and Beckett Hit Up a Sci-Fi Convention! (PHOTOS) 2 of 5 Prev Autoplay Next Share Tweet October 18, 2012 at 10:21AM EDT by Lindsay Dreyer Related: Castle, Spoilers, Season 5 Episode 6 full size Credit: Ron Tom/ABC Television Group © 2011 Disney Beckett Visits Rick's Booth in Castle Season 5, Episode 6: "The Final Frontier"
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