New series 1/10. Music enthusiast Charlie Gillett returns with a fourth series in which he unites diverse musical genres around a shared theme or link. He continues with "invisible visionaries", typified by influential producers, record-label bosses and A&R men, starting today with record producer John Hammond , who died in 1987, aged 76, following an astonishing career in which he worked with Bessie Smith , Benny Goodman , Count Basie, Billie
Holiday, Babatunde Olatunji , Bob Dylan , Aretha Franklin , Leonard Cohen , Bruce Springsteen and many other A-list performers.