Joyce DiDonato (Mary), Elza van den Heever (Elizabeth), Matthew Polenzani (Leciester) perform the Act I finale from Donizetti's "Maria Stuarda" which airs on PBS Sunday, July 14 at 12 p.m. (check local listings). Please view the original post to see the video.
SOURCE: PBS at 05:24PM on July 1, 2013