When an ax wielding psychopath breaks out of a mental hospital to get to the P.I. office, is Rick Castle marked for death?

Or was he really after the anti-Christ in Castle Season 8 Episode 21?

Yes, these were the kinds of questions this installment forced us to ask.

When a secret vault revealed religious clues, were Castle and the team at the 12th be able to solve the case before the end of day?

To find out, watch Castle online here at TV Fanatic. Just use the video above. It's fast, efficient and oh so very easy to do so.

C. Orlando was a TV Fanatic Staff Writer. Follow her on Twitter.