Overview
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.
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4 - 1Rise September 19, 2011 -
4 - 2Heroes & Villains September 26, 2011 -
4 - 3Head Case October 03, 2011 -
4 - 4Kick the Ballistics October 10, 2011 -
4 - 5Eye of the Beholder October 17, 2011 -
4 - 6Demons October 24, 2011 -
4 - 7Cops & Robbers October 31, 2011 -
4 - 8Heartbreak Hotel November 07, 2011 -
4 - 9Kill Shot November 21, 2011 -
4 - 10Cuffed December 05, 2011 -
4 - 11Till Death Do Us Part January 09, 2012 -
4 - 12Dial M for Mayor January 16, 2012 -
4 - 13An Embarrassment of Bitches January 23, 2012 -
4 - 14The Blue Butterfly February 06, 2012 -
4 - 15Pandora (1) February 13, 2012 -
4 - 16Linchpin (2) February 20, 2012 -
4 - 17Once Upon a Crime February 27, 2012 -
4 - 18A Dance with Death March 19, 2012 -
4 - 1947 Seconds March 26, 2012 -
4 - 20The Limey April 02, 2012 -
4 - 21Headhunters April 16, 2012 -
4 - 22Undead Again April 30, 2012 -
4 - 23Always May 07, 2012
