Total Recall
This science fiction blockbuster from 1990 began its production life as a very different movie than the one that was released. An adaptation of the Philip K. Dick short story "We Can Remember It for You Wholesale," Total Recall was originally conceived of with Richard Dreyfuss starring as a Walter Mitty-like character who experiences a variety of artificially induced fantasies. The movie we know is a mega-budget action epic set on Mars. Arnold Schwarzenegger plays a normal working man who discovers that his entire reality has been invented to conceal a plot of planetary domination.