Some great TV shows have made their way onto DVD this week including: Underdog - Complete Collector's Edition - The set itself is impressive, and the nostalgia factor is undeniable and palpable; Downton Abbey Season 1 - it lives up to its hype, and if its great, addictive, can't-watch-just-one fun is an essential part of it, it has a real classiness to it, too; and The Story of Ireland - a fast-paced, engaging look at the turbulent history of a country that is far more fascinating than the images of the color green and shamrocks often associated with it. Other shows recently reviewed include:  Above Suspicion - Set 1, Tavis Smiley Reports: Too Important to Fail, and Hazel: The Complete Second Season.  Want more?  Check out all of the TV on DVD reviews in the DVDTalk database.