Russia's War: Blood Upon the Snow (1996)

Made not long after the Soviet Union collapsed, when formerly secret Soviet archives opened to Western and Russian historians for the first time, this ten-part British-Russian series tells the Eastern Front and the Stalin years around it from the Soviet side. That is exactly the part of the war The World at War could only glimpse. Richard Overy is credited as historical consultant and Nigel Hawthorne narrates. It is grim, demanding viewing, but for the scale and cost of the fighting in the east it is the series to watch.