I'll Be Back

Credits

 * John Lennon – rhythm guitar (1962 Gibson J-160E), lead vocals
 * Paul McCartney – bass guitar (1963 Hofner 500/1), backing vocals
 * George Harrison – rhythm guitar (1963 Gibson J-160E)
 * Ringo Starr – drums

Background
John found the chords for "I'll Be Back" by playing a Del Shannon song, which was probably "Runaway."