Based on episodes of the series "Moomin Stories", the Moomins reminisce about the fondest moments of their lives. Moominpappa reminisces about his childhood; Moomintroll reminisces about how he, Sniff, and Snufkin set out to find out if Earth was truly threatened by a comet; and Moominmamma reminisces about the incredible visit of aliens from outer space.
| Actor | Role |
|---|---|
 Michał SzewczykMoomintroll (voice) | Moomintroll (voice) |
| BBarbara BorkowskaMamusia Muminka / Ciotka Paszczaka (voice) | Mamusia Muminka / Ciotka Paszczaka (voice) |
 Andrzej HerderTatuś Muminka / Paszczak / policjant / profesor / arcykról (voice) | Tatuś Muminka / Paszczak / policjant / profesor / arcykról (voice) |
 Stanisław Kwaśniaknarrator / Ryjek / Fredriksson / Piżmowiec (voice) | narrator / Ryjek / Fredriksson / Piżmowiec (voice) |
 Barbara MarszałekWiercipiętek / Mimbla / synek Marsjanin / Filifionka (voice) | Wiercipiętek / Mimbla / synek Marsjanin / Filifionka (voice) |
 Alicja KrawczykMigotka / Mała Mi / mama Marsjanka (voice) | Migotka / Mała Mi / mama Marsjanka (voice) |
| MMarek KołaczkowskiWłóczykij / duch / Edward Olbrzym / ojciec Marsjanin (voice) | Włóczykij / duch / Edward Olbrzym / ojciec Marsjanin (voice) |