When gold medalist Jim Thorpe was dubbed "the world's greatest athlete" at the 1912 Olympics, it wasn't hype. Football, baseball, lacrosse, even ballroom dancing ... Thorpe was the world's first multi-sport superstar. But when the Native American icon had his Olympic medals unjustly stripped from him, he faced his toughest hurdle yet. Mo talks to biographer David Maraniss about Thorpe's meteoric rise from Oklahoma Indian territory to global celebrity, and his surprising third act in Hollywood. Plus an interview with granddaughter Anita Thorpe. And Mo visits Jim Thorpe, Pennsylvania, a town with a history as startling as the man himself.