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World famous mystery writer Richard Castle finds unexpected inspiration when Detective Kate Beckett questions him about a series of murders that based on his books.
On Castle Season 8 Episode 20, when a movie star turned theater actor is killed, Castle and Beckett learn he had a nefarious reason for choosing Shakespeare.
On Castle Season 8 Episode 19, the team at the 12th tries to solve the case when a safety inspector mysteriously survives not one, but two attempts on his life.
On Castle Season 8 Episode 18, Castle and Beckett rush to clear Hayley's name when she is implicated in a killing and cyber-terror attack after helping a friend.
On Castle Season 8 Episode 17, when a man who smuggled Turkish relics is killed, the team at the 12th search for a stolen antique believed to be Aladdin’s lamp.
On Castle Season 8 Episode 16, Esposito's past comes back to haunt him when an old romance may be involved with the death of an armored-car driver.
On Castle Season 8 Episode 15, when an NYPD recruit is murdered, the team heads back to the academy to investigate and Castle struggles with a major decision.
On Castle Season 8 Episode 14, when Castle heads to L.A. to solve his disappearance, he ends up being recruited by the Greatest Detective Society to solve a case.
On Castle Season 8 Episode 13, Castle goes undercover when an English as a Second Language student is murdered and his class won't talk to the police.
On Castle Season 8 Episode 12, Beckett and the 12th race to save Rick when he is forced to work with strangers to solve deranged puzzles involving mind games.
On Castle Season 8 Episode 11, Beckett and Castle end up in a dangerous game of international crime when the son of a Russian diplomat turns up dead.