Successful mystery novelist Richard Castle starts working with the New York Police Department (NYPD) homicide investigation team after a serial killer decides to use plots from his novels for no good.
Premiered: March 9, 2009
Season 4, Episode 3 Head Case
First Aired: October 3, 2011
Castle and Beckett learn about life-extension science and how far people will go for the fountain of youth when they investigate a possible homicide in which there's no body. Elsewhere, Alexis hears from Stanford University's admissions department.
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