Watch Castle Online: Check Out Season 8 Episode 21

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The countdown to a life without Kate Becktt is underway.

We're sadly just a few days away from the final installment of Castle Season 8 and, along with it, the departure of Stana Katic.

But that's for next Monday. This is just time to talk about Castle Season 8 Episode 21

On the latest installment of this ABC drama, A psychiatric inmate escaped and actually dropped dead in Castle's PI office. That caused quite the problem.

From there, the investigation that followed had Castle surmising the Antichrist could be involved.

Yeah. You really should just watch Castle online to see where this all went.

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