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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 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.
On Castle Season 8 Episode 10, when Castle testifies as a key witness to a murder, he and Kate end up racing to prevent a miscarriage of justice.
On Castle Season 8 Episode 9, Castle And Beckett investigate the competitive world of a capella when a body is found in the theater of Martha’s latest show.
On Castle Season 8 Episode 8, Castle and Beckett end up trapped at sea on a ship with a killer when they investigate a cruise ship entertainer's murder.
On Castle Season 8 Episode 7, as Castle and Beckett's first wedding anniversary nears they must solve a brutal murder and help save Espo and Ryan's partnership.
On Castle Season 8 Episode 6, with Beckett away, Castle must help figure out if Det. Slaughter is guilty or innocent when a robbery case turns into a murder.
On Castle Season 8 Episode 5, Castle and Beckett work with a witness with a heightened sense of smell to catch a killer who stole a priceless work of art.
On Castle Season 8 Episode 4, when Castle discovers that his idol, a reclusive author has turned up dead, he and Beckett investigate but uncover strange secrets.
Castle goes undercover as a college professor on Castle Season 8 Episode 3 and learns some dark secrets but can he win back Beckett in the process?