This week on “Picture Perfect,” we’re seeing double. Tune in for music from “Vertigo” (Bernard Herrmann), “La double vie de Véronique” (Zbigniew Preisner), “Dead Ringer” (André Previn), and “The Prince and the Pauper” (Erich Wolfgang Korngold). Double your pleasure with movies about mirror images, this Saturday at 6 pm.