The Prague Research Institute of Air Engineering is to prepare a proposal to reduce dust in Ostrava, especially in the area where the new power plant is to be built. That is why engineers Vojtěch Spára and Jiří Zástěra will travel to Ostrava. Eva Frágnerová, a hygienist, will strongly oppose the power plant project near the housing estate.
| Actor | Role |
|---|---|
 Blanka BohdanováNot listed | Not listed |
 Karel HögerNot listed | Not listed |
 Elo RomančíkVojtěch Spára | Vojtěch Spára |
 Lubor TokošNot listed | Not listed |
 Dana MedřickáNot listed | Not listed |
 Anna MelíškováNot listed | Not listed |
 Irena KačírkováNot listed | Not listed |
 Jarmila KrulišováNot listed | Not listed |
 Josef LangmilerNot listed | Not listed |
| MMagda MaděrováNot listed | Not listed |
| EEva SirotkováNot listed | Not listed |
| JJarmila SmékalováNot listed | Not listed |
| JJosef SvátekNot listed | Not listed |
 Oldřich VelenNot listed | Not listed |
| AAdolf MinskýNot listed | Not listed |
| IInocenc BřezinaNot listed | Not listed |
| PPavel NebedaNot listed | Not listed |
| JJan PaclNot listed | Not listed |
 Vítězslav VejražkaVojtěch Spára (voice) | Vojtěch Spára (voice) |