One day, third grade students received “invitation cards” with amazing content: “Dear friend, inhabitant of planet Earth! If you want to meet people of another civilization, come to the dance floor in the old park tonight”. This meeting, of course, did not take place, but there was a reason for good fun and interesting conversation...
| Actor | Role |
|---|---|
 Georgi BurkovPlanetarium Lecturer | Planetarium Lecturer |
 Ekaterina Golubeva-PoldiKatya Sinitsyna | Katya Sinitsyna |
 Ian Khviler'Myamlya' Krotov, Anton's younger brother | 'Myamlya' Krotov, Anton's younger brother |
 Tatyana BozhokNina Grigoryevna, Teacher | Nina Grigoryevna, Teacher |
 Yekaterina VasilyevaValentina Serafimovna, Teacher | Valentina Serafimovna, Teacher |
 Yevgeniya KhanayevaDirector of the School, Nina's Grandmother | Director of the School, Nina's Grandmother |
 Rina ZelyonayaGreat Grandmother | Great Grandmother |
 Mariya VinogradovaDasha Gushchina's Grandmother | Dasha Gushchina's Grandmother |
 Elena FinogeevaVera Vladimirovna, Dima's Mother | Vera Vladimirovna, Dima's Mother |
| MMariya KovtunDasha Gushchina | Dasha Gushchina |
| DDmitri LitvinovDima 'Golovastik' Golovanov | Dima 'Golovastik' Golovanov |
| VVladimir BorisovAnton Krotov | Anton Krotov |