>> he sobered up, he took care of his son. he learned a lot about diet and health and was living a more adult life. and he wasn't just being drunk like a teenage kid. and i think that all comes out this the "double fantasy" album. >> in september of 1980, lennon and ono were ready to let the world in on their covert project. writer david chef scored lennon's first major interview in years. >> you could tell he was so, so, so at peace. he was excited about being a dad. he was excited about this new creative burst, you know, that resulted in these albums. he was so in love. you can't rehearse that. >> november 17, 1980. "double fantasy" was released. at 40, lennon felt he was turning a new page. a you in album, talk of a world tour, better health, and a stable family life. like the album's aptly titled