“Little Child” paints a tantalizing picture of the organic sound of the Beatles, giving a taste of their early years.

“Helter Skelter” shatters previous stereotypes of the Beatles and, in turn, reveals the future of rock music.

The Beatles deep cut “Mother Nature’s Son” proves Paul McCartney’s mastery of simplicity in melody, subject and arrangement.

The off-kilter charm of “Don’t Pass Me By” showcased Ringo Starr’s personality, while also serving as the first step on a path away from the Beatles.

George Harrison’s struggle to balance a simple existence with a rock star’s hedonistic lifestyle is chronicled in the Beatles deep cut “It’s All Too Much.”

John Lennon turned a satirical pen on himself and his bandmates for this stand-out deep cut from the Beatles’ self-titled 1968 studio project.

The Beatles’ darkly experimental “Long, Long, Long” foreshadows a frequent trope in George Harrison’s solo work: comparing spiritual and romantic love.

Like the Beatles’ other covers, Larry Williams’ “Bad Boy” reveals their roots: In this case, rhythm and blues.

“Act Naturally” came, well, naturally for Ringo Starr. He had flirted with country music long before joining the Beatles.

The Beatles, particularly John Lennon and Paul McCartney, were avid students of the Texas-born singer-songwriter Buddy Holly.