Well I have had the orginal VHS release since it was released back in 1977, I don't think I have watched a more interesting series since, just awesome. The interviews with the politians of the time can never be done again and its the late R V Jones who in his understated way shows how science played a large part in the outcome of the second world war. I have managed to make a back up on DVD but would dearly love to buy the series on DVD from the BBC if only they would release it.ten out of ten all day long.