Watch Grimm Season 1 Episode 4 online via TV Fanatic with over 8 options to watch the Grimm S1E4 full episode. Affiliates with free and paid streaming include Amazon, iTunes, Vudu, YouTube Purchase, Google Play, Amazon Prime, Xfinity, and TNT.
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Monroe goes undercover this week, while a stranger seeks revenge for the death of a pal at the hands of a Grimm.