Басты рөлдер
Ян Тржиска
Jan Svozil
Jana Hliňáková
Jaroslav Rava
Stanislav Hradecký
Jana Hlaváčková
Vlasta Martínková
Gabriela Wilhelmová
Hana
Zdena Herfortová
Eva Svozilová
Oldřich Vykypěl
ROH chairman
Oldřich Slavík
Jaroslav Stehlík (uncredited)
Jiří Hanák
Miroslav Janoušek (uncredited)
Vilém Pfeiffer
Bartoněk (uncredited)
Jiří Dušek
Zdražil (uncredited)
Milan Pásek
Institute director (uncredited)