Many close associates of the fab four have been attributed the title 'the fifth Beatle' - but there's one who stands out from that roster.
In 2016 Paul McCartney paid tribute to producer Sir George Martin in his final farewell some 54 years after Martin first signed the Beatles. Paul said in his tribute that "If anyone earned the title of the fifth Beatle it was George."
It's a moniker Sir George shares with a bank of other names, including manager Brian Epstein, who probably shares the top spot as most deserving of the title. Yet, there was another "fifth Beatle," one who never made the headlines but who never left the fab four's side at perhaps the most important time in their history.
