Linchpin (2)

Name: Linchpin (2)
Director: Rob Bowman
Released: 2012-02-20
Duration: 44 min
Rating: 8.0
Cast: Jennifer Beals, Josh Stamberg, Jim Turner, David Chisum, Cal Gibson

S4 E16 February 20, 2012 0h 44m ★ 8.0

Source:

Overview

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.