1. 'Groundhog Day' (1993)
Time travel doesn't have to span hundreds of years to be a significant plot element in a movie, of course: it can be hours, or a handful of seconds. Characters can be caught in a loop, or spawn alternate universes, or even kill their grandfathers, depending on the rules the filmmakers set up: at press time, actual time travel was still fictional. The time travel in this Bill Murray comedy, while limited to a single day, still plays into one of the most fundamental reasons for its persistence: the notion that if we had a chance to do our lives over, we could do it better the second time. The movie’s great subversion of that fantasy is the lesson that you could begin your do-over right now, in the present tense, on February 3rd and beyond.