After starting learning in a technical school a young student Sergey Berendeev proves to everybody that he's a real inventor.
| Actor | Role |
|---|---|
 Sergey ObrazovSergey Berendeev | Sergey Berendeev |
 Evgeniy Evstigneevotets Berendeeva | otets Berendeeva |
 Aleksei SmirnovArtur Bragin | Artur Bragin |
 Lev DurovKopylov | Kopylov |
 Boris IvanovPapakhanov | Papakhanov |
 Aleksei MironovPavel Ivanovich | Pavel Ivanovich |
 Leonid KanevskyNachalnik militsii | Nachalnik militsii |
| AAnatoliy ArtyomovNot listed | Not listed |