Airs Saturday, December 28 at 12 noon. The 2013-14 Metropolitan Opera Radio Broadcast season continues with a live broadcast of Puccini’s Tosca, starring soprano Sondra Radvanovsky in the title role. Tenor Marcello Giordani is Tosca’s lover, the artist and revolutionary Cavaradossi, and baritone George Gagnidze is the corrupt police chief, Scarpia. Marco Armiliato leads this performance of Puccini’s celebrated tragedy. Tosca will be heard live over the Toll Brothers-Metropolitan Opera International Radio Network.