Ewa Kasprzyk
— Ewa
Paweł Wawrzecki
— Paweł
Maria Klejdysz
— grandmother
Piotr Korczarowski
— Piotruś
Leon Niemczyk
— professor
Franciszek Trzeciak
— plumber
Maciej Kozłowski
— boy's father
Lidia Bogaczówna
— boy's mother
January Brunov
— tree defender
Monika Bolly
— (uncredited)
Czesław Czapliński
— scientist-photographer (uncredited)
Przemysław Dąbrowski
— man (uncredited)
Lech Dyblik
— man (uncredited)
Marek Kasprzyk
— man (uncredited)
Ryszard Kotys
— man (uncredited)
Radosław Popłonikowski
— man (uncredited)
Jan Heba
— man (uncredited)