Castle - Mon 9 May, season 8 episode 18
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Catch up TV on Castle. Watch the latest and all other episodes of Castle now online, broadcast on Seven. Catch up on your favorite Seven TV show: Castle. Replay tv on its best! When someone starts using his books as the blueprints for brutal murders, a mystery novelist begins assisting the NYPD with some of their homicide cases, whether they want his help or not.