World at War - 10/10
One of the best WWII documentaries i've seen. You probably won't be the same after watching this.
Started it in 2006 and got halfway through. It really stuck in my head. I finally finished it this week. It's 22 hours long!
I'd say it's tied with "WWII in HD" as a favorite.
Only negative is the sound is horrible. You really need headphones to understand the dialogue. Very muffled at times.
To think they even released a blu-ray version of this! It's only from 1974 too.