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

23. 'The Flash' (2014-Present)

You can keep your cinematic universes: The best comic-book adaptation of all time is going into its third season on the CW. Although Grant Gustin's scarlet speedster gets his powers from a particle-accelerator meltdown, the show's perfect mixture of giddy adventure and heart-tugging drama feels less like a matter of science than magic. It's grown-up enough to realize there's nothing juvenile about enjoying comics' lighter side. Let's face it: The movies have their dark knights and stoic avengers, but if you're craving a hyperintelligent telepathic gorilla, there's only one place to get your fix. SA

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