4: Savoy Theatre. Backstage at the Savoy, Donald Macleod squeezes down the same stairs that Sullivan trod in the theatre that was built to stage his greatest triumphs. Today's programme features excerpts from Gilbert and Sullivan's Patience, lolanthe, Princess Ida, Ruddigore, The Yeomen of the Guard and The Mikado-their single greatest hit. Plus excerpts from Sullivan's incidental music for The Merry Wives of Windsor and an unusual collaboration with Gilbert: the sacred musical drama The Martyr of Antioch.