Castle
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.

Season 8 · Episode 4 ·
What Lies Beneath
When Castle's idol, a famously reclusive author, turns up dead, Castle is determined to solve his hero's murder. But as he and Beckett dig deeper, they discover that truth is stranger than fiction.
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Episode 4 of season 8 of Castle: “What Lies Beneath”. Aired 2015-10-12. Watch it online free on ZapFlix.