Cyril Cusack
— Galileo
Георги Калоянчев
— Giordano Bruno
Gigi Ballista
— commissario domenicano
Giulio Brogi
— Giovanni Francesco Sagredo
Piero Vida
— Papa Urbano VIII
Georgi Cherkelov
— Toskana's ambasador
Nikolay Doychev
— Belarmin
Miroslav Mindov
— Kardinal Bordzhiya
Maya Dragomanska
— figlia di Galileo
Giampiero Frondini
— cardinale
Paolo Graziosi
— Gian Lorenzo Bernini
Nevena Kokanova
— Marina
Max Turilli
— Acquapendente
Lou Castel
— padre Charles
Dante Cona
Mikhail Mikhaylov
— Sarpi
Vittorio Duse
Jean Rougeul
Antonio Nediani
Sergio Fincato
Maria Cumani Quasimodo
Anna Maria Gherardi
