Serge Merlin
Jakub Gold
Alina Janowska
Lucyna
Elżbieta Kępińska
Kazia, Malina's Niece
Jan Ciecierski
Józef Malina
Tadeusz Bartosik
"Professor" Pankrat
Władysław Kowalski
Fiałka / Jakub Gold (voice)
Irena Netto
Jakub's Mother
Beata Tyszkiewicz
Stasia
Jan Ibel
Genio
Bogumił Antczak
Prisoner (uncredited)
Wiesława Chojkowska
Wiśka (uncredited)
Edmund Fetting
Zygmunt, Guest at Lucyna's Party (uncredited)
Roland Głowacki
Guest at Lucyna's Party (uncredited)
Andrzej Herder
Gestapo Officer (uncredited)
Zygmunt Hübner
Gestapo Officer (uncredited)
Zofia Jamry
Woman Blackmailing Malina (uncredited)
Stanisław Jaśkiewicz
Professor at a Lecture (uncredited)
Zbigniew Józefowicz
Guest at Lucyna's Party (uncredited)
Edward Kowalczyk
Policeman (uncredited)
Zygmunt Listkiewicz
(uncredited)
Jerzy Łapiński
Caroller (uncredited)
Zdzisław Maklakiewicz
ONR Member (uncredited)
Zygmunt Malawski
Printer (uncredited)
Roman Polanski
Partner of Malina's Blackmailer (uncredited)
Ryszard Pracz
(uncredited)
Ryszard Ronczewski
Prison Guard (uncredited)
Magda Teresa Wójcik
Woman at Lucyna's Party (uncredited)
Tomasz Zaliwski
Prisoner (uncredited)
Andrzej Żuławski
Killed Student (uncredited)