Castle' season 7 spoilers: Serial killer 3XK will be coming for Richard Castle
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![Castle 3x06: 3XK || The Real Triple Killer Gets Away [1080p HD/CC] - YouTube](https://i.ytimg.com/vi/YYkypTxvBS8/maxresdefault.jpg "Castle 3x06: 3XK || The Real Triple Killer Gets Away [1080p HD/CC] - YouTube")
Castle 3x06: 3XK || The Real Triple Killer Gets Away [1080p HD/CC] - YouTube
Pentland Hills triple killer Andrew Walker dies in care home - BBC News
![Castle 7x15: Reckoning || Castle Outsmarts Jerry Tyson/3XK [1080p HD/CC] - YouTube](https://i.ytimg.com/vi/NoZL3aDxxVs/mqdefault.jpg "Castle 7x15: Reckoning || Castle Outsmarts Jerry Tyson/3XK [1080p HD/CC] - YouTube")
Castle 7x15: Reckoning || Castle Outsmarts Jerry Tyson/3XK [1080p HD/CC] - YouTube
ABC's 'Castle' recap: 3XK seeks revenge on Castle, targets Beckett in 'Resurrection' | Movies/TV | nola.com
![Castle 3x06: 3XK || The Triple Killer is Back [1080p HD/CC] - YouTube](https://i.ytimg.com/vi/TEThxaslgIs/maxresdefault.jpg "Castle 3x06: 3XK || The Triple Killer is Back [1080p HD/CC] - YouTube")
Castle 3x06: 3XK || The Triple Killer is Back [1080p HD/CC] - YouTube
Watch Castle (2009) season 3 episode 6 streaming online | BetaSeries.com
Castle" 3XK (TV Episode 2010) - IMDb
![Castle 3x06: 3XK || Jerry Tyson is the Real 3XK [1080p HD/CC] - YouTube](https://i.ytimg.com/vi/3EDsAbyQj84/maxresdefault.jpg "Castle 3x06: 3XK || Jerry Tyson is the Real 3XK [1080p HD/CC] - YouTube")
Castle 3x06: 3XK || Jerry Tyson is the Real 3XK [1080p HD/CC] - YouTube
ABC's 'Castle' recap: 3XK seeks revenge on Castle, targets Beckett in 'Resurrection' | Movies/TV | nola.com
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3XK | Castle Wiki | Fandom
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Prime Video: Castle Season 3
