Top 20 Greatest Sci-Fi TV Series

These sci-fi TV series made the future seem so much closer. For this list, we’ll be looking at the most influential, beloved, and critically acclaimed science fiction shows to grace our screens. Our countdown includes "The Mandalorian," "Babylon 5," "Doctor Who," and more! Which sci-fi series can YOU rewatch over and over? Be sure to let us know in the comments below!

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