Mondays 10:00 PM on ABC
Castle
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Looking to watch Castle Season 5 Episode 6 online? TV Fanatic is your destination for every paid and free streaming option of the Castle S5E6 full episode from 2 affiliates.

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Episode Details

Castle Season 5 Episode 6: "The Final Frontier"

Castle and Beckett find themselves investigating a murder at a sci-fi convention which has them dealing with crazy costumed fans and egotistical celebrities on this episode of Castle.