Forty years on from the release of the landmark album A Love Supreme, Alan Yentob charts the life of hugely influential jazz saxophonist John Coltrane. Lol Lovett’s film looks at how his improvisational technique impacted not only on jazz but also on other art forms - his innovations have been felt in performance art and even in contemporary dance music - and shows how his profound spirituality entered into every area of his life and work.