Watch Smallville Season 10 Episode 3 online via TV Fanatic with over 5 options to watch the Smallville S10E3 full episode. Affiliates with free and paid streaming include Amazon, iTunes, Vudu, YouTube Purchase, and Google Play.
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This episode is titled "Supergirl" for a reason. Laura Vandervoort returns and her character tells Clark she was sent by Jor El in order to stop the dark force that is on the way.