Each disc contains 4 episodes: 2 "main" episodes with Joe, and 2 "bonus" episodes with STEVE!!! Yes, the one and only Steve Burns, the original Blue's Clues host. You just have to use the DVD menu to get to the Episode Selection screen, and the Bonus Episodes are the ones with Steve.
My daughter is 16 months old, and Blue's Clues is the only show she's interested in. She gets very excited when she knows that it's coming on, or when I put one of the DVDs in the player. She dances for the songs, especially the main Blue's Clues song, and this is the only show she'll actually watch (and want to watch). She doesn't seem to care if it's Steve or Joe, but my wife and I prefer Steve (nothing against Joe, but Steve just has this way about him that makes the show more entertaining, even for adults).
All in all, this is a great collection, and not deserving of the low star rating it was getting. Blue's Clues is a fantastic, award-winning kids' show, that emphasizes fun learning and building self-confidence and encourages kids to think through things for themselves. This DVD set is no exception to that high level of quality.