Prog Rock Britannia is a comprehensive, feature-length documentary about progressive music and the generation of bands that made it - from the international success stories of Yes, Genesis, ELP, King Crimson and Jethro Tull, to the trials and tribulations of the lesser-known bands such as Caravan and Egg. 　　The film is structured in three parts, charting the birth, rise and decli... (展開全部)