Watch Castle Season 3 Episode 16 online via TV Fanatic with over 7 options to watch the Castle S3E16 full episode. Affiliates with free and paid streaming include Amazon, iTunes, Vudu, YouTube Purchase, Google Play, TNT, and Verizon On Demand.
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Adrian Pasdar debuts on Castle this week, playing a federal agent. He's brought in to take over the investigation of a massive conspiracy.