Tonight on the show: Extension 720 tonight helps the Lyric Opera of Chicago celebrate its 50th anniversary with a program featuring the best of this gala season and seasons past. BILL MASON, general director of the Lyric Opera, ROGER PINES, historian and dramaturg at the Lyric, as well as soprano ERIN WALL and mezzo-soprano JUDITH CHRISTIN will join the program to play and discuss highlights from the history and current season of the Lyric.

More information on this and other programs is available at our monthly program guide. You can listen to the show from 9 to 11 p.m. central time here.