Tristan und Isolde

After more than 20 years singing the female lead in Wagner's 'Tristan und Isolde,' soprano Nina Stemme is retiring the role. As she tells Melinda Whiting, it wasn't hard to say goodbye — though her longtime Tristan, tenor Stuart Skelton, admits to some sadness. Hear their exclusive interview with WRTI, before hearing their electric performance on The Philadelphia Orchestra in Concert.

It's Richard Wagner's transcendent and tragic masterpiece, Tristan und Isolde on WRTI this Saturday at 1 pm. The two lovers will be sung by Canadian tenor…