Season 5, Episode 23 The Human Factor

First Aired: May 6, 2013

A whistle-blower is killed and the crime scene gets sealed by Homeland Security. As Castle and Beckett continue to pursue the case, they learn that the cause of death was not a car bomb but a missile from a military drone.

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  • Premiered: March 9, 2009
  • Rating: TV-PG
  • Premise: 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. (more)

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