Introduction; 1. Opera or broadway musical: The human comedy; 2. “You hear it sung . . . and the world seems different”: William Finn's sung-through; 3. Scores; 4. Nearly sung-through; 5. “Maid for broadway”: The sung-through structure of Caroline, or change; 6. “We sing it anyway”: The sung-through musical in the early twenty-first century; Epilogue: “What's this cheery singing all about?”; Bibliography.