When did Castle Season 8 Episode 21 air?
Castle Season 8 Episode 21 aired on May 9, 2016.
Castle
A whole new chapter in crime solving.
After a serial killer imitates the plots of his novels, successful mystery novelist Richard "Rick" Castle receives permission from the Mayor of New York City to tag along with an NYPD homicide investigation team for research purposes.
Created by: Andrew W. Marlowe
Season 8 · Episode 21
Hell to Pay
May 9, 2016·44m
When an axe-wielding, escaped psychiatric inmate drops dead in Castle’s P.I. office, Castle and Beckett’s investigation leads Castle to suspect the victim’s death could be the work of the Antichrist.
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How long is Castle Season 8 Episode 21?
This episode runs for approximately 44 minutes.
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