The classically trained composer was the Beatles' closest collaborator throughout the 1960s, producing virtually all their music. Music critics agree they wouldn't have been the Beatles without him.
Martin, who died yesterday in London, was among the earliest to recognize The Beatles' talents and is often credited with helping them develop their sound. Originally broadcast in 1980.
In 1962, George Martin signed an unknown band: The Beatles. Steve Inskeep talks to Ray Connolly, who made a documentary series with Martin called The Rhythm of Life, about Martin's death at age 90.