The box office is booming. New international markets are opening weekly. Amazing advances in technology hold the promise of new delivery systems. Yet there's trouble bubbling just below the surface in Hollywood today as movie industry creative types struggle to adapt to new business realities. On the eve of one of the biggest weekends for new movie releases, FRONTLINE explores the changing Hollywood, revealing how once-fiercely independent studio bosses must now answer to the megacorporations that have swallowed the industry whole.