Watch 'The Simpsons,' from EW's New Classics Collection

What's left to say about The Simpsons after 19 years? It's really the signature pop-cultural achievement of our era. It was the clear choice for the top spot on our list of the Top 100 TV Series of the last 25 years in the new EW 1000 issue. The show's universe has grown so vast that each episode seems like an encyclopedia of the human experience as we know it today — take, for instance, last month's "Mona Leaves-a" episode (which you can watch in full, below), whose opening credits alone trace the evolution of life on this planet from single-celled organisms to Homer Sapiens.

This is the fifth installment in EW.com's selection of 10 great episodes of programs on our top 100 list. We'll be streaming an episode from a different show every day, or you can watch the entire slate in one sitting at Hulu. The first half of the list is here; Part 2 is here.