Guest Stars Peter Sullivan as Cardinal Ascanio Sforza Vernon Dobtcheff as Cardinal Versucci Gina McKee as Caterina Sforza Thure Lindhardt as Rufio Sebastian De Souza as Alfonso of Aragon Cyron Melville as Cardinal Farnese Melia Kreiling as Bianca Leo Bill as Cardinal Costanzo Patrick O'Kane as Francesco Gonzaga Matias Varela as King Ferdinand II of Naples Jonah Russell as Cardinal Petrucci Wendy Nottingham as Abbess Antal Leisen as Cardinal Grimani Paul Putner as Venetian Envoy Péter Polgár as Monk Réka Sinkó as Sister Angela Szilvia Pinter as Sister Sylvia