By 1966, The Beatles were at a critical point in their career. Having toured constantly since their formation, the group s two central composers had reached a level of sophistication and studio advancement that precluded their latest songs from being performed in a live setting, and indeed on their final tour that summer, they failed to perform a single cut from their most recent record, Revolver. They didn't disappoint with Revolver of course, and the more up-market music critics who had, often unfairly, derided their earlier work, now took notice. When the group followed this masterpiece with Sgt Pepper's, The White Album, Abbey Road, et al, the reputation of Messrs. Lennon and McCartney as the finest songwriters in all of pop music was cemented, and still remains in place. This film re-appraises and re-documents the compositions and productions that The Beatles released between 1966 and their demise in 1970. With the assistance of rare archive material and new interviews, this documentary shines a fresh light on this quite extraordinary body of work.