From executive producers Brian Grazer and Ron Howard comes this fascinating National Geographic Channel documentary miniseries that follows eminent scientists and researchers applying cutting-edge techniques to the most challenging issues of our day, from clean energy to pandemics to water supply to human longevity. Episode directors include Howard, Brett Ratner, Peter Berg, Angela Bassett, Paul Giamatti, and Akiva Goldsman. 6 episodes on 2 discs. 4 1/2 hrs. Widescreen; Soundtrack: English; Subtitles: English (SDH).