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