When did Castle Season 5 Episode 21 air?
Castle Season 5 Episode 21 aired on April 22, 2013.


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 Beckett is assigned to protect Erik Vaughn, a charming billionaire entrepreneur whose life is in danger, she's forced to reflect on her relationship with Castle which has begun to plateau. Meanwhile, consumed with jealousy, Castle goes to extraordinary lengths to solve the case and separate the two of them.
Direct answers for episode-level questions and details.
Castle Season 5 Episode 21 aired on April 22, 2013.
This episode runs for approximately 43 minutes.
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