Filmed entirely on location in Italy, Sweden, and London, this program contains extensive archival footage of all three singers, taken from newsreels, feature films and concerts; extensive examples of their singing; and interviews with people who knew and worked with them, some of whom have never spoken before on camera. By the end of this absorbing documentary - hosted by the internationally renowned tenor, Nigel Douglas - one knows not only something of their lives, but why these three tenors are legendary singers.