Castle 2009 | TV Show Watchlist

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A murder-mystery writer and a homicide detective team up to solve unusual crimes in New York City, and their professional relationship soon crosses the line into romance.

Premiered: March 9, 2009

Rating: TV-PG

User Rating:4.75 out of 5 (5,834 ratings)

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Season 4, Episode 14 The Blue Butterfly

First Aired: February 6, 2012

Castle and Beckett revisit a private eye's 1947 homicide after realizing it's connected to a present-day murder they're investigating.

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