Casts
Barbara Steele
as Helen Karnstein / Mary Karnstein
George Ardisson
as Baron Kurt Hummel
Halina Zalewska
as Elizabeth Hummel / Adele Karnstein
Umberto Raho
as Von Klage
Laura Nucci
as Grumalda
Giuliano Raffaelli
as Count Humboldt
Nello Pazzafini
as Monk
Aldo Barozzi
as Plague Victim (uncredited)
Alba Maiolini
as Wife of Plague Victim (uncredited)
Aldo Massasso
as The Priest (uncredited)
