The Oprichnik

Tchaikovsky is best known in operatic circles mostly for three of his eleven operas: “Eugene Onegin,” “Mazeppa,” and “The Queen of Spades.” You’ve heard “Cherevichki,” “Vakula the Smith,” and “The Enchantress” on the Sunday Opera, but on this week’s program (3/24 3:00 p.m.), we’re turning to his second existing opera, “The Oprichnik” from 1874, and it’s hopefully another work with which you aren’t that familiar.