The summer movie season has a fever. And the only prescription is more cowbell sequels.



Summer 2015 is no exception, as "Avengers: Age of Ultron," "Mad Max: Fury Road," and "Pitch Perfect 2" compete for our hard-earned allowance money. Some of the most notable Part Two's and Three's have come out of the summer movie season, especially in recent years.



As four-quel "Jurassic World" continues to dominate the box office, here are 20 of the best sequels (in order of release) of the last 20 years that you need to see. At least twice.