Watch Castle Season 8 Episode 18 online via TV Fanatic with over 6 options to watch the Castle S8E18 full episode. Affiliates with free and paid streaming include Amazon, iTunes, Vudu, YouTube Purchase, Google Play, and Verizon On Demand.
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On Castle Season 8 Episode 18, Castle and Beckett rush to clear Hayley's name when she is implicated in a killing and cyber-terror attack after helping a friend.