What is it that makes sci-fi shows so appealing? Maybe it's because so many of the cast members are "out of this world" hot!
From Supernatural's Jared Padalecki to Battlestar Galactica's sexy cylon Tricia Helfer, there are plenty of sci-fi sexpots to choose from. So, we want to know: Who do you think are the sexiest sci-fi stars?
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