Anyone been watching Nazi Megastructures. I find them really good, very informative and going further in explaining each of their roles within the war and how in the end they failed. Watched Season 1/2/3/4. Sky is showing Season 5 now, but to be honest Season 5 to me is a re-hash of the earlier seasons, nothing really new to learn or know. My only major gripe is that since Nazi Megastructures is a production of National Geographic which is a Canadian Network, you cannot obtain Seasons 3/4 on DVD (Region 2) as they are only in Region 4 (Canada). They have only produced Seasons 1 & 2 in Region 2, which I'm delighted to own. I've been looking for Seasons 3 & 4 in Region 2 for ages to no avail. I even sent an email to National Geographic and still waiting for a reply off months ago. They must like losing revenue!