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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7. 'Firefly' (2002-2003)

Combining the space adventure with the Western was always going to test the limits of primetime television, but Joss Whedon's one-season wonder was doomed from the start thanks to network indifference. Still, the show's diehard fans (who'd eventually call themselves "Browncoats") helped make this ambitious series about a band of rebels fighting both a galaxy-wide government and cannibalistic "reavers" a posthumous cult hit; Whedon would eventually continue its story on the big-screen with the 2005 movie Serenity. At its best, Firefly felt like the essence of Han Solo distilled into 14 episodes. ST

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