Mozart, Wolfgang Amadeus (composer), Friday/Sunday: William Stone, Susan King, Winifred Brown, Stephen Markuson, Judith Wininger, Kathleen Karnes, Ernest Brandon, Paul Weichsel, Philip Larson, Clinton Thatch, Nancy Wait (performer), Saturday (if different): Jeffrey Foote, Barbara Boyd, Caroline Bell, Antonio Pavao, Marcia Toole, Judy May, Winslow Hancock, John Ricketts with the Illinois Opera Group (performer), Richard Aslanian (musical director), David Barron (stage director), Laura Zirner (set design), and Susan Benson (costume design)