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A woman's body is discovered ritually posed, and odd symbols turn up in her apartment. Soon, a monk becomes the prime murder suspect, and Castle thinks there is a conspiracy at work. Meanwhile, Castle struggles to accept Alexis' new living arrangements.
Alexis believes that a death-row inmate was wrongly convicted, so she seeks investigative assistance from her dad. However, they only have 72 hours to reexamine the original murder case before the inmate's scheduled execution.
As Castle and Beckett investigate the homicide of a popular relationship therapist, their theory for the motive for her murder shifts: The killer may not have sought her high-profile client list, but instead wanted a rare, pricey object she possessed.
Castle and Beckett look after a baby boy given to a priest by a dying man who stumbled into a church. Their investigation reveals that the infant was not related to the murdered man, and finding the baby's parents proves difficult.
Cast & Details See all »
- 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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Watch the final scene of the Castle series finale