The film is based on real events and reveals the tragic episodes from the life of the Austrian biologist scientist-materialist Paul Kammerer (1880-1926), hunted by regressive scientists and Catholic reactionaries who committed suicide.
Bernhard Goetzke
Professor Zange
Natalya Rozenel
Felitsia, professor's wife
Elza Temary
Berta, professor's assistant
Nikolai Khmelyov
Prince Karlstein
Sergei Komarov
Bsheshinski, Jesuit
Vladimir Fogel
Baron, reactionary
Mikhail Doller
Russian student Filonov, professor's assistant
Aleksandr Chistyakov
Pryer, typographer
