Watch Doctor Who Season 12 Episode 4 online via TV Fanatic with over 6 options to watch the Doctor Who S12E4 full episode. Affiliates with free and paid streaming include Amazon, iTunes, Vudu, YouTube Purchase, Google Play, and BBC America.
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On Doctor Who Season 12 Episode 4, the Doctor and her companions land in 1903 and must find who is sabotaging Nikola Tesla's generator plant at Niagara Falls.