Overview: Renée Fleming sings one of her signature roles, the title character in Dvořák's Rusalka, an opera about a water spirit's tragic romance with a prince. The story is drawn partly from Hans Christian Andersen's "The Little Mermaid." Conductor Yannick Nézet-Séguin leads a cast that includes Piotr Beczala; Dolora Zajick; Emily Magee; and John Relyea as Rusalka's father, the Water Sprite.