Jaroslav Rava
饰 Stanislav Hradecký
Jana Hlaváčková
饰 Vlasta Martínková
Gabriela Wilhelmová
饰 Hana
Zdena Herfortová
饰 Eva Svozilová
Oldřich Vykypěl
饰 ROH chairman
Oldřich Slavík
饰 Jaroslav Stehlík (uncredited)
Jiří Hanák
饰 Miroslav Janoušek (uncredited)
Vilém Pfeiffer
饰 Bartoněk (uncredited)
Jiří Dušek
饰 Zdražil (uncredited)
Milan Pásek
饰 Institute director (uncredited)
Karel Adam
饰 Department manager (uncredited)
Helena Trýbová
饰 Scientist (uncredited)
Vladimír Pavlar
饰 Doc. Rozehnal (uncredited)
Bohumil Slezáček
饰 Professor (uncredited)
Arnošt Navrátil
饰 Doctor (uncredited)
Sylvie Nitrová
饰 Nurse (uncredited)
Marcela Dürrová
饰 Laboratory assistant (uncredited)
Miroslav Donutil
饰 Assistant (uncredited)
