40 Best Science Fiction TV Shows of All Time

From superhero shows and space operas to creepy anthology series, the greatest small-screen sci-fi of all time

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3. 'Battlestar Galactica' (2004-2009)

You can't throw a remote without hitting one of TV's infinite reboots, but none has done it better than new, vastly improved BSG. Working from the original idea of humanity's last remnants seeking out a new home, (re-)creator Ronald D. Moore explored how societies are born and how they almost die, the temptations toward religious zealotry and fascism, and whether the human race was really worth saving at all. Its notorious finale polarized even diehard fans — but its turn toward mysticism was always part of the show's abiding interest in the power of faith, and even that sting has faded over time, leaving it as one of the genre's greatest accomplishments. So say we all. SA

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