Castle - Season 4 Episode 16
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.
First Air Date : 2009-03-09
Last Air date : 2016-05-16
Runtime : 57 minutes
Cast : Nathan Fillion, Stana Katic, Molly C. Quinn, Jon Huertas, Seamus Dever, Susan Sullivan
Crew : Zach Cannon (Script Coordinator), Alexi Hawley (Executive Producer), Terence Paul Winter (Executive Producer), Mark S. Glick (Co-Producer), Nathan Fillion (Producer), Barry O'Brien (Consulting Producer)
Quality : 
Subtitles :
- Season 4 : Episode 12011-09-19
- Season 4 : Episode 22011-09-26
- Season 4 : Episode 32011-10-03
- Season 4 : Episode 42011-10-10
- Season 4 : Episode 52011-10-17
- Season 4 : Episode 62011-10-24
- Season 4 : Episode 72011-10-31
- Season 4 : Episode 82011-11-07
- Season 4 : Episode 92011-11-21
- Season 4 : Episode 102011-12-05
- Season 4 : Episode 112012-01-09
- Season 4 : Episode 122012-01-16
- Season 4 : Episode 132012-01-23
- Season 4 : Episode 142012-02-06
- Season 4 : Episode 152012-02-13
- Season 4 : Episode 162012-02-20
- Season 4 : Episode 172012-02-27
- Season 4 : Episode 182012-03-19
- Season 4 : Episode 192012-03-26
- Season 4 : Episode 202012-04-02
- Season 4 : Episode 212012-04-16
- Season 4 : Episode 222012-04-30
- Season 4 : Episode 232012-05-07
