He never played to an unsold seat. Better known by his given name than anyone else, his voice has been heard by more people than any other performer's. His motion pictures became box office triumphs on the strength of his name alone. His raw talent, which sprang from America's Southern backwoods, changed the course of popular music and culture. On the day Elvis Presley died--August 17, 1977--there was pandemonium outside his Memphis home and around the world. He was only 42, and to millions he was magic. Now producer David L. Wolper uses his camera to probe the mystique of a superstar in This Is Elvis.