Castle S4E16
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S04E16 — Linchpin (2)
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Castle

S04E16 Linchpin (2)

2012-02-20

Castle and Beckett are on a frantic mission to locate the "Linchpin" to prevent the initial trigger that could lead the United States into war. As they delve deeper into the investigation, Castle encounters Sophia Conrad, a savvy and alluring CIA agent who inspired the character Clara Strike in his "Derrick Storm" novels. Additionally, the intelligence officer Martin Danberg makes a return, adding another layer of complexity to their high-stakes pursuit.

Season 4 Episodes

1
Rise
2011-09-19
 2
Heroes & Villains
2011-09-26
 3
Head Case
2011-10-03
 4
Kick the Ballistics
2011-10-10
 5
Eye of the Beholder
2011-10-17
 6
Demons
2011-10-24
 7
Cops & Robbers
2011-10-31
 8
Heartbreak Hotel
2011-11-07
 9
Kill Shot
2011-11-21
 10
Cuffed
2011-12-05
 11
Till Death Do Us Part
2012-01-09
 12
Dial M for Mayor
2012-01-16
 13
An Embarrassment of Bitches
2012-01-23
 14
The Blue Butterfly
2012-02-06
 15
Pandora (1)
2012-02-13
 16
Linchpin (2)
2012-02-20
 17
Once Upon a Crime
2012-02-27
 18
A Dance with Death
2012-03-19
 19
47 Seconds
2012-03-26
 20
The Limey
2012-04-02
 21
Headhunters
2012-04-16
 22
Undead Again
2012-04-30
 23
Always
2012-05-07