Plácido Domingo is the most important person alive in opera. Greatest of the stage tenors still performing, experienced conductor, intendant of not one but two US opera houses these bald facts hardly begin to delineate the man. Major sponsorship flocks to him, his influence is felt in opera houses worldwide, and his support can be the making of a singer's career. And once every ten years he allows television cameras in. This time is probably the last television look at his active career and takes the form of a retrospective of his greatest work, building up a picture of this unique man throughout his extraordinary career.