Czesław Roszkowski

as Jonasz Reguła

as Counselor Baczyński / Koziołek, lost-and-found office worker

as Wacław Kawanias

as Teacher

as Bein

as Mikołaj Kotula

as Flaw Commitee Member

as Telegram Carrier

as Agnieszka's neighbor (uncredited)

as Barski

as profesor