Sci-fi movies with terrible sequels are often forgettable, but a sequel that's able to surpass the original in quality can truly be something special. A good, original movie can have a lasting impact on audiences, and sequels often carry the burden of needing to surpass them in order to satiate fans. A good sequel can be difficult to make, but some franchises manage to pull it off with gusto. You might have an easier time finding sci-fi movie remakes that are better than the original. Be sure to grab your popcorn, as we'll also show you where these sequels are available online.