Klara Roumianova

Ivan Semenov (voice)

Тамара Дмитриева

Ivan's classmate (voice)

Антонина Дмитриева

The teacher (voice)

Михаил Яншин

First doctor (voice)

Анатолий Папанов

Second doctor (voice)

Георгий Вицин

Third doctor (voice)