Cyril Cusack as Galileo

Georgi Kaloyanchev as Giordano Bruno

Gigi Ballista as commissario domenicano

Giulio Brogi as Giovanni Francesco Sagredo

Piero Vida as Papa Urbano VIII

Georgi Cherkelov as Toskana's ambasador

Nikolay Doychev as Belarmin

Miroslav Mindov as Kardinal Bordzhiya

Maya Dragomanska as figlia di Galileo

Giampiero Frondini as cardinale

Paolo Graziosi as Gian Lorenzo Bernini

Nevena Kokanova as Marina

Max Turilli as Acquapendente

Lou Castel as padre Charles

Dante Cona as

Mikhail Mikhaylov as Sarpi

Vittorio Duse as

Jean Rougeul as

Antonio Nediani as

Sergio Fincato as

Maria Cumani Quasimodo as

Anna Maria Gherardi as

Claudio Cassinelli as

Raimondo Penne as

Nikolay Uzunov as