Overview: Valery Gergiev conducts the double bill, which is a co-production with Teatr Wielki-Polish National Opera. Anna Netrebko stars as the title character in Iolanta, with Piotr Beczala and Aleksei Markov as Vaudémont and Robert, two rivals for her love. Nadja Michael sings the central role of Judith in Bluebeard’s Castle, with Mikhail Petrenko as her mysterious and menacing new husband.