Cast
Witold Skaruch
Kasperski
Janina Borońska
Ludka Balwikówna (voice)
Zbigniew Płoszaj
Jerzy Zygmunt Nowak
Institute Assistant (uncredited)
Barbara Ludwiżanka
Ludka's Aunt
Aleksander Sewruk
Ludka's Father
Elżbieta Starostecka
Jadzia (voice) (uncredited)
Maria Homerska
Professor Mareszowa
Jan Machulski
Ludka's Neighbour
Agnieszka Fitkau
Stefan's Lover
Ewa Mirowska
Store Clerk
Anna Seniuk
Eliza
Janusz Bukowski
Stefan
Małgorzata Lorentowicz
Parents' Committee Member
Tadeusz Pluciński
Neighbour's Business Partner
Iwona Słoczyńska
Teacher