At the age of 91, Mel Brooks is unstoppable, with his musical Young Frankenstein opening to great critical acclaim in London in late 2017. Alan Yentob visits Mel at home in Hollywood, at work and at play. With the aid of BBC archive stretching back decades, together they embark on an unpredictable, irresistible journey through the city of stars, meeting the legendary Carl Reiner along the way. The driver is Mel Brooks - you have been warned