Watch Castle Season 8 Episode 21 online via TV Fanatic with over 6 options to watch the Castle S8E21 full episode. Affiliates with free and paid streaming include Amazon, iTunes, Vudu, YouTube Purchase, Google Play, and Verizon On Demand.

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Episode Details

On Castle Season 8 Episode 21, an axe-wielding, escaped inmate turns up dead and theinvestigation leads Castle to suspect it could be the work of the Antichrist.

Rating: 2.9 / 5.0 (172 Votes)
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Castle Season 8 Episode 21 Quotes

You know as well as I do that when the lights go out, bad things happen.


Well I will be sure to cross reference Shaw's visitor against the list of fallen angels.