When did Castle Season 8 Episode 18 air?
Castle Season 8 Episode 18 aired on April 18, 2016.


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.

After Hayley does a favor for an old friend, she finds herself implicated in a killing and cyber-terror attack. Now, Beckett and Castle must rush to solve the case and clear Hayley’s name.
Direct answers for episode-level questions and details.
Castle Season 8 Episode 18 aired on April 18, 2016.
This episode runs for approximately 44 minutes.
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