Maestro James Levine conducts a powerful performance of one of 20th-century opera's greatest masterpieces in this 1994 telecast released here on DVD for the first time.  The extraordinary singing actress Hildegard Behrens stars in the monumental title role of Strauss's blazing opera, based on the Sophocles play.  Deborah Voigt, in one of her early Met triumphs, is her sister, Chrysothemis, and Brigitte Fassbaender plays their demented mother, Klytamnestra, in a memorable appearance.