On screen
Cast
17 credited performers
Barbara Steele
Helen Karnstein / Mary Karnstein
George Ardisson
Baron Kurt Hummel
Halina Zalewska
Elizabeth Hummel / Adele Karnstein
Umberto Raho
Von Klage
Laura Nucci
Grumalda
Giuliano Raffaelli
Count Humboldt
Nello Pazzafini
Monk
Artwork unavailable
Jeffrey Darcey
The Messenger
Aldo Barozzi
Plague Victim (uncredited)
Artwork unavailable
Mario Casella
Gorca (uncredited)
Artwork unavailable
Severino D'Ottavi
Party Guest (uncredited)
Alba Maiolini
Wife of Plague Victim (uncredited)
Aldo Massasso
The Priest (uncredited)
Enzo Mondino
Villager at the Execution (uncredited)
Artwork unavailable
Piero Pastore
Baron Von Letz (uncredited)
Sylvia Sorrente
Gorca's Wife (uncredited)
Artwork unavailable
Terry Velasco
Gorca's Daughter (uncredited)