In The Beatles’ catalog, “Hey Bulldog” is a bridge between the psychedelic excesses of 1967 and the rock and roll revivalism they would pursue on the White Album and Let It Be. Written by John Lennon, the song is a straightahead rocker featuring a seductive boogie-style riff and some excellent aggressive lead guitar work.

George Harrison’s withering indictment of Britain’s progressive tax system was chosen to open the Beatles’ most progressive musical effort to date. Opening with a rasping cough and a droll count-in, “Taxman” kicks off Revolver in startling fashion, demonstrating both Harrison’s growing sophistication as a songwriter and Emerick’s budding talent for sculpting guitar tones.

Whether it was jealousy, ego or apathy, the other members of the band didn't seem to care too much for the tune when Harrison introduced it to them and attempted to record initial takes on August 16. After more work on the song on September 3 and 5, he decided he didn't like what he heard and scrapped the recording.

On this day in 1965, The Beatles recorded “Help!” -- the song -- during a four-hour session that started around 7 p.m. at Abbey Road Studio Two in London. Twelve takes were recorded; the first eight were of the rhythm tracks only, with vocals appearing for the first time on take nine. John Lennon -- the song's primary writer -- sang lead vocals, backed by Paul McCartney and George Harrison.