High Quality Content by WIKIPEDIA articles! "Tomorrow Never Knows" is the final track of The Beatles` 1966 studio album Revolver but the first to be recorded. Credited as a Lennon–McCartney song, it was written primarily by John Lennon. Music critic Richie Unterberger of Allmusic said it was "the most experimental and psychedelic track on Revolver, in both its structure and production."