The second week of Nightly Met Opera Streams showcases the works of Richard Wagner and begins with a 2016 performance of Tristan und Isolde. In this excerpt, soprano Nina Stemme sings Isolde’s climactic Liebestod, conducted by Sir Simon Rattle. Stream the opera tonight, March 23, from 7:30PM EDT until tomorrow, March 24, at 6:30PM EDT. This stream will be available, with subtitles, online at metopera.org as well as on all Met Opera on Demand apps, including IOS, Android, Apple TV, Amazon Fire de