Watch Castle Season 3 Episode 6 online via TV Fanatic with over 5 options to watch the Castle S3E6 full episode. Affiliates with free and paid streaming include Amazon, iTunes, Vudu, YouTube Purchase, and Google Play.
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Is the Tripler Killer back after a four year hiatus? It seems that way this week, as Castle and Beckett play a dangerous game of wits with the murderer.