Linchpin (2) (S04E16)
S04E16
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.
Show
Castle
Episode
S04E16
Air Date
Feb 20, 2012
Season 4 Episodes
S04E01
Rise
S04E02
Heroes & Villains
S04E03
Head Case
S04E04
Kick the Ballistics
S04E05
Eye of the Beholder
S04E06
Demons
S04E07
Cops & Robbers
S04E08
Heartbreak Hotel
S04E09
Kill Shot
S04E10
Cuffed
S04E11
Till Death Do Us Part
S04E12
Dial M for Mayor
S04E13
An Embarrassment of Bitches
S04E14
The Blue Butterfly
S04E15
Pandora (1)
S04E16
Linchpin (2)
S04E17
Once Upon a Crime
S04E18
A Dance with Death
S04E19
47 Seconds
S04E20
The Limey
S04E21
Headhunters
S04E22
Undead Again
S04E23
Always