8 Season
173 Episode
Castle - Season 4 Episode 16 Linchpin (2) (2016)
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.
- Country : United States of America
- Genre : Drama, Crime
- Studio : ABC
- Director : Andrew W. Marlowe
- Cast : Nathan Fillion, Stana Katic, Molly C. Quinn, Jon Huertas, Seamus Dever, Susan Sullivan
