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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 7 Episode 21, on a flight to London, Castle and Alexis try to find the killer of an Air Marshall before they can take down the plane.
On Castle Season 7 Episode 20, Rick and Kate search for answers concerning Castle's disappearance after he has series of recurring dreams but the results turn deadly.
On Castle Season 7 Episode 19, the team nvestigates when a personal injury attorney known as "The Pitbull" is murdered and the 12th wagers on a talent contest.
On Castle Season 7 Episode 18, Kevin Ryan must reconstruct events leading up to shots being fired while he was on the security detail protecting an up and coming congressman.
On Castle Season 7 Episode 17, Beckett and Castle team up with a high-powered female detective from Hong Kong who claims to know the victim of their latest murder.
On Castle Season 7 Episode 16, when an astronaut turns up dead inside of a Mars simulation, Castle and Beckett don spacesuits to investigate.
On Castle Season 7 Episode 15, in the conclussion of this two-parter, the team at the 12th precinct must outwit 3XK and Dr. Kelly Nieman in order to save Beckett.
On Castle Season 7 Episode 14, when clues to a murder lead back to Dr. Kelly Nieman, things take an even more serious turn when they uncover a connection to Jerry Tyson.
On Castle Season 7 Episode 13, Rick is hired to find out if his client's husband is having an affair but he's shocked when he ends up witnessing her murder.
On Castle Season 7 Episode 12, the death of a young telenovela actress has Beckett and her team investigating the case and Rick searching for her missing purse.