Castle

Season 4 Episode 16: Linchpin (2)

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.

Genre:

Drama, Crime

Seasons:

8

Episodes:

173

Actor:

Nathan Fillion, Stana Katic, Molly C. Quinn

Quality:

HD

Status:

Canceled

First Air:

2009

IMDb:

8.0