Airs Saturday, December 12, at 12 noon. The 2015-16 Metropolitan Opera Radio Broadcast season continues with a broadcast of Verdi’s timeless tragedy Rigoletto. The acclaimed young American soprano Nadine Sierra makes her Met broadcast debut as Rigoletto’s innocent daughter Gilda. Željko Lučić is Rigoletto, who tries to shelter her from the evils of his world; and Piotr Beczala is the licentious Duke. The cast also features Russian bass Dimitry Ivashchenko in his Met broadcast debut as the assassin Sparafucile and Nancy Fabiola Herrera as his sister and accomplice Maddalena, and Roberto Abbado conducts. Rigoletto will be heard live over the Toll Brothers-Metropolitan Opera International Radio Network at 12:00 p.m. CT on Saturday, December 12.