The young scientist Alexey invites his colleagues to present his invention. The real reason for the presentation lies in the teacher Alexey, whom he wants to publicly surpass.
| Actor | Role |
|---|---|
| MMikhail PlutakhinAlexey Romanovich | Alexey Romanovich |
| EElizaveta Prokudinamechanical girl | mechanical girl |
| TTrofim KorchinovPetr | Petr |
| AAlexander KurnyaevPavel Egorovich | Pavel Egorovich |
| VVadim Radchenkocollector | collector |
 Viktor BalabanovBakhrushin Sr. | Bakhrushin Sr. |
 Dmitry OdintsovBakhrushin ml. | Bakhrushin ml. |