The history of aviation is explored in a high-flying quintet of Discovery Channel documentaries. The collection takes off with "The Ultimate Guide: Planes," which soars across the decades as the airplane rapidly evolves; "Frontiers of Flight: Powered Flight" reveals how the pioneers of flight designed the first aircrafts; "Frontiers of Flight: Air Transportation for All" chronicles the development of planes as vehicles of mass transport; "NextWorld: Future Flight" offers a provocative look into the next generation of planes; and "Thunderbirds" reveals the exploits of an elite corps of the U.S. Air Force. 3 3/4 hrs. total. Standard; Soundtrack: English Dolby Digital mono; Subtitles: English (SDH).