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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27. 'Stargate SG-1' (1997-2007)

One of the unlikeliest success stories in sci-fi TV history, this show's origins lie in the offbeat 1994 film by future Independence Day impresarios Dean Devlin and Roland Emmerich. Sensing something special, MGM snapped up the rights and spun it into a sprawling, ambitious saga of ancient alien civilizations and human soldiers and scientists tasked with uniting with the good ones against the bad ones. Strong, Egypt-inspired visuals and a memorable cast headed by MacGyver's Richard Dean Anderson helped generate several spinoffs and made the show the longest-running sci-fi series at the time. STC

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