Linchpin

Season 4, Episode 16, Aired
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Full Episode Summary

Time is running out as Castle and Beckett race to find "Linchpin" in order to prevent an event that could plunge the country into war. (Part 2 of 2)

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Categories

Drama, Suspense

Themes

City Living, Facing Danger, Ruthless Killing, Single Parent, Unlikely Friendships