Watch Castle Season 3 Episode 1 online via TV Fanatic with over 7 options to watch the Castle S3E1 full episode. Affiliates with free and paid streaming include Amazon, iTunes, Vudu, YouTube Purchase, Google Play, Xfinity, and TNT.
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Castle as a murder suspect?!? That's how season three kicks off, as Beckett starts the episode having not seen her partner in awhile, only to later arrest the author.