A boy is by an accident a member of a crew that is going to travel to the moon.
| Actor | Role |
|---|---|
 Vera BendinaKolya (voice) | Kolya (voice) |
 Evgeniya MoresPetya (voice) | Petya (voice) |
 Valentina SperantovaSandy (voice) | Sandy (voice) |
 Galina NovozhilovaNatasha (voice) | Natasha (voice) |
 Mikhail YanshinProfessor (voice) | Professor (voice) |
 Vladimir GotovtsevWatchman (voice) | Watchman (voice) |
 Liliya GritsenkoNavigator (voice) | Navigator (voice) |
 Vladimir GribkovWarden (voice) | Warden (voice) |