On Castle Season 8 Episode 21, an axe-wielding, escaped inmate turns up dead, and the investigation leads Castle to suspect it could be the work of the Antichrist.
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 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 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 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 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 2, Beckett's side of her disappearance is revealed as she gets a mysterious tip from her past and must figure out who wants her dead.
It's Beckett's first day on the job in the first of a two part premiere, but nerves quickly give way to a deadly new mystery on Castle Season 8 Episode 1.
On Castle Season 7 Episode 23, a body in the woods leads Rick back to a traumatic childhood event, while Kate faces a career dilemma in the season finale.
On Castle Season 7 Episode 22, when the creater of "Saturday Night Tonight" is murdered, Castle and Beckett uncover his shocking secret. Carly Rae Jepsen guest stars.