Superman III

Richard Lester returns to direct this action adventure sequel starring Christopher Reeve as the DC Comics superhero. Exposure to synthetic Kryptonite causes a drastic alteration to Superman's personality, turning the normally upstanding superhero into a corrupt and immoral villain, clearing the path for megalomaniac tycoon Ross Webster (Robert Vaughn) and computer programmer Gus Gorman (Richard Pryor) to take over the world.