Together let us purely
Indulge a whim we surely
Are faultless to fulfill.
For nobleman and peasant
While doing what is pleasant
Cannot be doing ill.
These tinkly lyrics are not from a vintage operetta but from one of the best—and in a sense most modern—productions ever accorded Mozart's Don Giovanni. For all the Met's fine performances this year, the NBC Opera Company's TV version last week stood out as a high point of the opera season. Usually, English translations of opera have the incongruous effect of a grey flannel suit at a fancy dress ball, but this time Poet W. H....