BBC documentary. Witness John Williams composing the legendary score for The Empire Strikes Back and conducting the London Symphony Orchestra. BBC documentary. Witness John Williams composing the legendary score for The Empire Strikes Back and conducting the London Symphony Orchestra. BBC documentary. Witness John Williams composing the legendary score for The Empire Strikes Back and conducting the London Symphony Orchestra. BBC documentary. Witness John Williams composing the legendary score for The Empire Strikes Back and conducting the London Symphony Orchestra.