Many of the greatest science fiction franchises of all-time have benefitted from multiple cinematic installments that help expand their mythologies. Not every sequel to "Star Wars," "Star Trek," and "Alien" is great, but few would argue that their legacies are isolated to just one film. Occasionally, a sequel is even better than the original; recent films like "Mad Max: Fury Road" and "Blade Runner 2049" surpassed expectations and became classics in their own right.

But not every sci-fi...

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