When did Castle Season 4 Episode 23 air?
Castle Season 4 Episode 23 aired on May 7, 2012.


A whole new chapter in crime solving.
After a serial killer imitates the plots of his novels, successful mystery novelist Richard "Rick" Castle receives permission from the Mayor of New York City to tag along with an NYPD homicide investigation team for research purposes.

When the murder of an Army veteran puts Beckett on the trail of the man who shot her, Castle must decide how much he's willing to sacrifice to keep her safe. As secrets are revealed and feelings are put on the table, the lives of the detectives at the 12th Precinct may never be the same.
Direct answers for episode-level questions and details.
Castle Season 4 Episode 23 aired on May 7, 2012.
This episode runs for approximately 44 minutes.
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