I purchased Seasons One and Two of the Universe from the History Channel.com website. This is a collection of nine DVDs in all, and my husband and I have watched all of them and just love them. I'm interested in anything that has to do with the stars and planets, and this collection covers all the bases. We learn about the planets, the stars, supernovas, black holes, the galaxies, nebulas, constellations, alien moons, dark matter, and much more. There weren't alot of extra features, but the collection covers so much in and of itself that this didn't bother me. Season One is approximately 11 hours and 45 minutes long, and Season Two covers 14 hours and six minutes. I was able to get both seasons for the incredible price of $64.00 (they were having a sale). The video and audio quality are just great, and I know I will be watching these programs again.
If you are interested in the planets and the universe, you will love this collection. I highly recommend both Seasons One and Two.