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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 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.
On Castle Season 7 Episode 11, after getting kicked out of the 12th precinct, Castle figures out another way to be close to Beckett when he gets his private investigator's license.
On Castle Season 7 Episode 10, an ER physician is gunned down in the street. Esposito and Lanie, meanwhile, hit a crossroads in their relationship.
On Castle Season 7 Episode 9, the star of Rick's favorite old action movie is found dead. As a result, Castle and Beckett delve into the actor's past.
On Castle Season 7 Episode 8, Detective Esposito ends up in the middle of a deadly situation when a person of interest in a murder investigation takes a subway car hostage.
On Castle Season 7 Episode 7, Castle and Beckett are married! But they also learn that a murder victim may have been poisoned at an Old West-style resort.