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20 Best & Worst Sci-fi Films

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BEST 8. 'Back to the Future'

Maybe one of the best films ever, 1985's "Back to the Future" is the time-travel movie all other time-travel movies aspire to be. Sure, no one really knows why the flux capacitor does what it does and why it makes time-travel possible, but we don't really care.—XFINITY Entertainment Staff (Photo: Universal)

The opinions expressed are solely those of the author and do not necessarily reflect the views of Comcast.

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