But three hits in a row? That right there is the perfect movie trilogy. They are difficult to come by, but the third time really has been the charm for these franchises.

There are two types of movie trilogies ... multifaceted masterpieces that stand the test of time and influence filmmakers. Here are 20 trilogies that have changed cinema forever.

Looking for unforgettable movie trilogies? Our list features the best of the best. Binge on these over the weekend.