The nefarious thief and murderer Mac the Knife has just gotten married, and his sinister in-laws want his head. With its innovative score influenced by American jazz and 1920s German Cabaret, this first-of-its-kind pop opera became one of the most influential plays of the 20th Century. The trail-blazing musical collaboration of dramatist Bertolt Brecht and composer Kurt Weill transformed the musical theater with this deliciously dark satire of "respectable" society that features dashing thieves, saucy prostitutes and lingering melodies.