Mozart’s first operatic masterpiece returns to the Met in the classic Jean-Pierre Ponnelle production, conducted by James Levine. The superb ensemble includes Matthew Polenzani as the king torn by a rash vow; mezzo-soprano Alice Coote in the trouser role of his noble son Idamante; soprano Nadine Sierra as Ilia; and soprano Elza van den Heever as the volatile Elettra, who loves Idamante to the bounds of madness.