When did Castle Season 4 Episode 4 air?
Castle Season 4 Episode 4 aired on October 10, 2011.


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.

While investigating the mysterious shooting death of a young woman, Castle and Beckett face a cop's worst nightmare when they discover that the gun used in the killing is Det. Ryan's old service weapon - the one that was stolen by the serial killer, 3XK. Now with the clock ticking, the team must work to solve the murder, track down 3XK and retrieve Ryan's gun before the killer strikes again.
Direct answers for episode-level questions and details.
Castle Season 4 Episode 4 aired on October 10, 2011.
This episode runs for approximately 44 minutes.
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