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.

Writing:
  • Andrew W. Marlowe

Stars:
Release Date: 2009-03-09
Seasons: 1 2 3 4 5 6 7 8
TMDb: 8.0/10
  • Country: US
  • Language: English
  • Runtime: 45

Other episodes for this season

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