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.
| Creator | Andrew W. Marlowe |
|---|---|
| Actor | Nathan Fillion, Stana Katic, Molly C. Quinn |
| Country | United States of America |
| Production | Beacon Pictures |