This marvelous miniseries is over, but it has one final treat to deliver: a compilation of the behind-the-scenes sequences that ended each episode in one stand-alone, how-they-did-it The Making of Blue Planet II special. From the state-of-the-art technology of manned submersibles to the low-tech approach of a man with a snorkel, this show, in its own way, is every bit as amazing as the episodes focusing on the natural world itself.