Diễn viên
Zdeněk Maryška
Assistant (uncredited)
Jana Hlaváčková
Vlasta Martínková
Zdena Herfortová
Eva Svozilová
Oldřich Vykypěl
ROH chairman
Vilém Pfeiffer
Bartoněk (uncredited)
Gabriela Wilhelmová
Hana
Miroslav Donutil
Assistant (uncredited)
Jana Gazdíková
Secretary (uncredited)
Jan Tříska
Jan Svozil
Milan Pásek
Institute director (uncredited)