Final answer:
George Martin became The Beatles' producer in 1962, marking a pivotal moment in music history as he played a key role in their success.
Step-by-step explanation:
In 1962, George Martin became the group's producer, meeting with them for the first time on June 6th of that year. George Martin, often referred to as the "Fifth Beatle" for his extensive involvement with The Beatles, was instrumental in shaping the band's musical direction and success.
This historical event is a seminal moment in the history of music, marking the collaboration that would lead to the creation of some of the 20th century's most influential music.