Homer and Barney compete to be the first "average" American in space.

Troy McClure hosts a behind-the-scenes look at the show, including clips of the series' beginnings as shorts on "The Tracy Ullman Show," Simpsons trivia questions, and unaired scenes from popular episodes.

A "Behind the Music"-style look at the Simpsons, narrated by VH1's Jim Forbes, shows their rise to stardom--and the "private hell" that followed.