Anna Netrebko brings Tchaikovsky's lush fairy tale "Iolanta" to the Metropolitan Opera for the first time, singing the title role of a princess whose blindness is cured by love. The slightly surreal production is directed by Mariusz Trelinski with references to film noir, and as in "Eugene Onegin," Ms. Netrebko is conducted by the Russian master Valery Gergiev. He also leads the second half of the evening, Bartok's "Bluebeard's Castle," whose mysterious central couple (sung by Nadja Michael and Mikhail Petrenko) arrive at a less happy ending.