What do Bart Simpson, Batman and the Little Mermaid have in common? They all became huge stars in 1989, a year that shaped Hollywood as we know it today. In this episode of Nat Geo's 6-part series, television ad film icons James Brooks and Peter Guber peel back the curtain on the world of entertainment. They reveal how the overnight success of these three characters turned the old show business into the multifaceted modern industry it is today.