Everyone's favorite blue pooch is back, leaving a trail of intriguing clues -- as usual -- for friends Steve, Kevin and newest buddy Joe to solve. So, who is Joe? In this progrom, kids get to know him and find out why he's special. In "Joe's First Day," he plays show-and-tell with Steve; in "Steve Goes to College," Joe throws him a going-away party; and in "The Big Book About Us," everyone is able to fill pages with their favorite items.