He directed the musical, "Happy End," in an American Repertory Theatre production at the Loeb Stage in Cambridge, Massachusetts. Bertolt Brecht was lyricist. Kurt Weill was composer. Elisabeth Hauptmann wrote the original German play. Michael Feingold was American adapter and lyricist. Gary Fagin was music director and conductor. Michael H. Yeargan was set designer. William Ivey Long was costume designer. William Armstrong was lighting designer. Robert Brustein was artistic director.