30 years later, 'The Simpsons' are a part of the American family

"The Simpsons"
Homer might become a braniac, Marge might develop a gambling addiction or nerdy Lisa could find herself among the cool kids for a half-hour, but by the end of each episode of "The Simpsons" -- which first appeared 30 years ago as short segments on "The Tracey Ullman Show" -- the family and its hometown of Springfield resets to status quo.