Leszek Teleszyński as Michał

Małgorzata Braunek as Marta

Jan Nowicki as Jan

Jerzy Goliński as Michał's Father

Anna Milewska as Sister Klara

Michał Grudziński as Marian

Marek Walczewski as Rozenkranc

Hanna Stankówna as Lice Breeder

Alicja Jachiewicz as The Waitress

Leszek Długosz as Blind Man

Jadwiga Halina Gallowa as Rozenkrac's Mother

Halina Czengery as Michał's Mother

Grażyna Barszczewska as Lab Technician

Ewa Ciepiela as Lice Feeder

Janina Ordężanka as Olek's Mother

Tadeusz Huk as Lice Feeder

Andrzej Lajborek as Nurse

Janusz Miszczak as Łukasz

Krzysztof Fus as Olek

Andrzej Dobosz as Lice Feeder (uncredited)

Jerzy Stuhr as Lab Technician (uncredited)

Tadeusz Janczar as Blind Man (voice) (uncredited)