Speaking as an American veteran of Vietnam and longtime amateur military historian, I think this is an excellent series. I taped it from a broadcast by a Los Angeles station in late 1987, and I'm glad I did. I wish I could get a copy on DVD.
The Soviet-German struggle was by far the biggest and most important component of World War II, and has long been overlooked by us Americans, who like to think WE won the war, more or less by ourselves.
We did, of course, in the Pacific theater, but in Europe we helped the Soviets crush Adolf Hitler. It's telling that an estimated 88% of German military fatalities in the war were caused by the Soviets.