Castle - Season 4 Episode 4
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.
First Air Date : 2009-03-09
Last Air date : 2016-05-16
Runtime : 57 minutes
Cast : Nathan Fillion, Stana Katic, Molly C. Quinn, Jon Huertas, Seamus Dever, Susan Sullivan
Crew : Zach Cannon (Script Coordinator), Alexi Hawley (Executive Producer), Terence Paul Winter (Executive Producer), Mark S. Glick (Co-Producer), Nathan Fillion (Producer), Barry O'Brien (Consulting Producer)
Quality : 
Subtitles :
- Season 4 : Episode 12011-09-19
- Season 4 : Episode 22011-09-26
- Season 4 : Episode 32011-10-03
- Season 4 : Episode 42011-10-10
- Season 4 : Episode 52011-10-17
- Season 4 : Episode 62011-10-24
- Season 4 : Episode 72011-10-31
- Season 4 : Episode 82011-11-07
- Season 4 : Episode 92011-11-21
- Season 4 : Episode 102011-12-05
- Season 4 : Episode 112012-01-09
- Season 4 : Episode 122012-01-16
- Season 4 : Episode 132012-01-23
- Season 4 : Episode 142012-02-06
- Season 4 : Episode 152012-02-13
- Season 4 : Episode 162012-02-20
- Season 4 : Episode 172012-02-27
- Season 4 : Episode 182012-03-19
- Season 4 : Episode 192012-03-26
- Season 4 : Episode 202012-04-02
- Season 4 : Episode 212012-04-16
- Season 4 : Episode 222012-04-30
- Season 4 : Episode 232012-05-07
