Airs Saturday, January 27, 2018, at 12 noon. The 2017-18 Metropolitan Opera Radio Broadcast season continues with Puccini’s thrilling drama Tosca. Soprano Sonya Yoncheva stars as the jealous but devout diva Floria Tosca, opposite tenor Vittorio Grigolo as her lover, the artist Mario Cavaradossi. Baritone Željko Lučić is the villainous Scarpia. Emmanuel Villaume conducts the opera in a new production by Sir David McVicar. Tosca will be heard live over Toll Brothers-Metropolitan Opera International Radio Network at 12:00 noon CT on Saturday, January 27.