Who was the fifth Beatle?
That is open to debate. Stuart Sutcliffe was a fifth member early on, producer George Martin was a fifth musician with them in the studio, and they worked with occasional guest performers. Manager Brian Epstein was called a "fifth Beatle" by the band themselves.
A New York City radio DJ called "Murray the K" (Murray Kaufman) declared himself the "Fifth Beatle" when the band first visited New York. He had a popular show, and gave the Beatles endless promotion on that show, which they appreciated, so they let the nickname stick.
Many people have been referred to as the "Fifth Beatle" at different times, but the most obvious and probably top of the list being their long time recording guru and producer, Sir George Martin, another being long time Roadie, Assistant and CEO of Apple, Neil Aspinall.
Oodles Answer: Phil Spector
That title is informal, meaning that there was no fifth Beatle, but the title was thrown here and there. Some people regard the late Stuart Sutcliffe as the fifth Beatle during the Hamburg year but he left the 'Silver Beatles' during their Hamburg endeavours to live with Astrid, his German girlfriend, in Hamburg. He died of a brain bleed. Another person to be deemed the 'fifth Beatle' was the manager Brian Epstein and also guitarist…
George Martin was the Beatles' record producer. He is sometimes called the "fifth Beatle" because of his contributions to the Beatles' recordings. He chose the songs which they recorded, helped arrange their tunes, hired studio musicians when they were needed and occasionally played piano on some records. He was open-minded to the ideas of the Beatles and helped them translate their ideas into the finished recordings. As they grew as musicians in the studio, he…