Cast 26

1. 

   Jan Tříska

   Jan Svozil

2. Jana Hliňáková

3. Jaroslav Rava

   Stanislav Hradecký

4. 

   Jana Hlaváčková

   Vlasta Martínková

5. 

   Gabriela Wilhelmová

   Hana

6. 

   Zdena Herfortová

   Eva Svozilová

7. 

   Oldřich Vykypěl

   ROH chairman

8. Oldřich Slavík

   Jaroslav Stehlík (uncredited)

9. Jiří Hanák

   Miroslav Janoušek (uncredited)

10. 

    Vilém Pfeiffer

    Bartoněk (uncredited)

11. Jiří Dušek

    Zdražil (uncredited)

12. 

    Milan Pásek

    Institute director (uncredited)

13. Karel Adam

    Department manager (uncredited)

14. Helena Trýbová

    Scientist (uncredited)

15. Vladimír Pavlar

    Doc. Rozehnal (uncredited)

16. Bohumil Slezáček

    Professor (uncredited)

17. Arnošt Navrátil

    Doctor (uncredited)

18. Sylvie Nitrová

    Nurse (uncredited)

19. Marcela Dürrová

    Laboratory assistant (uncredited)

20. 

    Miroslav Donutil

    Assistant (uncredited)

21. Milan Kročil

    Assistant (uncredited)

22. 

    Zdeněk Maryška

    Assistant (uncredited)

23. Zdeněk Dryšl

    Houseman (uncredited)

24. 

    Jana Gazdíková

    Secretary (uncredited)

25. Blažena Rýznarová

    Official (uncredited)

26. Markéta Rauschgoldová

    Canteen assistant (uncredited)

Crew 10