Following triumphant Met turns in Roméo et Juliette, La Traviata, and Lucia di Lammermoor, Nadine Sierra summits another peak of the soprano repertoire as Amina, who sleepwalks her way into audiences’ hearts in Bellini’s poignant tale of love lost and found. In his new production, Rolando Villazón—the tenor who has embarked on a brilliant second career as a director—retains the opera’s original se...