French mezzo-soprano Sophie Koch (Charlotte) sings Charlotte’s aria, “Va! Laisse couler mes larmes” from Act III of Massenet’s Werther. Also on stage is Lisette Oropesa (Sophie). Great Performances at the Met: Werther airs Sunday, July 20 at 12 pm on PBS. (In New York, THIRTEEN airs the opera at 12:30 pm).