Watch Castle Season 4 Episode 4 online via TV Fanatic with over 6 options to watch the Castle S4E4 full episode. Affiliates with free and paid streaming include Amazon, iTunes, Vudu, YouTube Purchase, Google Play, and Verizon On Demand.
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Episode Details
Uh-oh. The gun used in a murder this week is discovered to be Det. Ryan's former service weapon. That can't be good.
- Show:
- Castle
- Season:
- Castle Season 4
- Episode Number:
- 4
