“Trilogy”, Emerson, Lake, and Palmer’s third studio album and fourth overall in barely two years, was released in July 1972, a high watermark peak for Progressive Rock’s quality as well as massive popularity ( #2 UK, #5 Billboard in the US )…Trilogy has remained a favorite over these many changes in rock music as the place where Keith Emerson, Greg Lake, and Carl Palmer’s ambitions to expand the palette of rock music were perfectly balanced by terrific songwriting and production on “The Endless Enigma”, “From the Beginning”, a terrific concert showstopper cover version of Aaron Copland’s “Hoedown” from the stage musical Oklahoma!, and the title song opus. Carl Palmer hosts with archival interviews from both the late Keith Emerson and Greg Lake.