The classic Beach Boys album Pet Sounds came out in 1966. Soon after that Brian Wilson, the main composer and driving force behind the Beach Boys, began hearing voices. He had a mental breakdown, which led him to spend three years in bed. Later, in the 1980s, he came under the control of a corrupt psychologist, Eugene Landy, who became a kind of svengali figure who took over every aspect of Wilson’s life. A new film coming out this week, Love & Mercy, tells the story of Brian Wilson during those two periods of his life. We hear from the director.