Trailer
 | Klara Rumyanova as Ivan Semenov (voice) |
 | Tamara Dmitrieva as Ivan's classmate (voice) |
 | Antonina Dmitrieva as The teacher (voice) |
 | Mikhail Yanshin as First doctor (voice) |
 | Anatoliy Papanov as Second doctor (voice) |
 | Georgiy Vitsin as Third doctor (voice) |
| Writing | |
| Aleksandr Khmelik | Screenplay |
| Lev Davydychyov | Book |
Directing | |
| Vadim Kurchevskiy | Director |
| Nikolay Serebryakov | Director |
Art | |
| Vadim Kurchevskiy | Art Direction |
| Nikolay Serebryakov | Art Direction |
Camera | |
| Teodor Bunimovich | Director of Photography |
Sound | |
| Andrey Babaev | Original Music Composer |
| Boris Filchikov | Sound Director |
Editing | |
| Lidiya Kyaksht | Editor |
Visual Effects | |
| Vyacheslav Shilobreyev | Animation |
| Pavel Petrov | Animation |
| Tamara Poletika | Animation |
| Yuriy Kuzyurin | Animation |
| Maria Zubova | Animation |
Art | |
| Viktor Kuranov | Property Master |
| Oleg Masainov | Property Master |
| Pavel Gusev | Property Master |
| Boris Karavaev | Property Master |
| Vladimir Abbakumov | Property Master |
| Lilianna Lyutinskaya | Property Master |
| Svetlana Znamenskaya | Property Master |
| Vera Kalashnikova | Property Master |
| Galina Filippova | Property Master |
| Marina Chesnokova | Property Master |
| Fyodor Oleynikov | Property Master |
| Semyon Etlis | Property Master |
| Valentin Ladygin | Property Master |
| Pavel Lesin | Property Master |
| Roman Gurov | Property Graphic Designer |
