I was very disappointed to discover that all three of the DVDs (over $50 worth) I purchased were not able to be shown with my DVD equipment because I live in the U.S. and do not have the equipment for viewing multiple regions, only the U.S. region. Since I had to open the packages to discover this, I could not return them. I am sure they are fine programs, having viewed one on PBS, and I had hoped to share them with my science students. I suggest this "region" restriction be boldly advertised in the description of the DVD. I had never heard about this so was not aware it could be a problem for me.