Castle & Beckett race to find the "Linchpin" in order to stop the first domino in a chain of events which will plunge the United States into war. Their efforts continue to put Castle in contact with Sophia Conrad - a smart, commanding and sexy CIA operative who was Castle's inspiration for Clara Strike in the "Derrick Storm" series of books; and intelligence officer Martin Danberg is back.
Keywords: criminal-consultant , criminal-investigation , female-detective , homicide-detective , new-york-city , novelist , police , police-procedural , writer , watch-series-online