The Beatles revived “One After 909”, a song dating from their early years, for Let It Be, their final album released in 1970. Its inclusion linked the group’s turbulent final period with their formative rock-and-roll sound, and the article argues that the performance captured a rare sense of shared enthusiasm.

Paul McCartney described the song as a collaboration inspired by bluesy freight-train songs, while John Lennon later suggested he had written it alone at 17. The band unsuccessfully attempted to record it in March 1963 for possible use around With The Beatles, before returning to it six years later; the released version drew heavily on their rooftop performance and featured George Harrison’s guitar, Billy Preston’s keyboards and Lennon–McCartney harmonies.