Stanisław Mikulski

Hans Kloss / Stanisław Kolicki

Seweryn Butrym

General Wierlinger ("I Know Who You Are")

Mieczysław Stoor

Sturmfuhrer Hans Stedtke ("I Know Who You Are")

Krzysztof Chamiec

Sturmbannfuhrer Lothar ("I Know Who You Are")

Janina Borońska

Irena ("I Know Who You Are")

Alicja Zommer

Doctor Marta Becher ("I Know Who You Are")

Wiktor Nanowski

Officer Interrogating Kloss ("I Know Who You Are")

Andrzej May

Jacek ("I Know Who You Are")

Wanda Koczeska

Basia Reczko ("Top Secret")

Igor Śmiałowski

Erwin Reil ("Top Secret")

Leon Niemczyk

Rioletto ("Top Secret")

Emil Karewicz

Hermann Brunner ("Top Secret")

Lech Ordon

Puschke ("Top Secret")

Marian Opania

Kazik Truchanowicz ("Top Secret")

Jerzy Walczak

Edward ("Top Secret")

Tadeusz Kalinowski

Kreisleiter ("Top Secret")

Mieczysław Waśkowski

Scharfuhrer Glaubel ("Top Secret")

Szczepan Baczyński

Old Man ("I Know Who You Are") (uncredited)

Jerzy Balbuza

Soviet Intelligence Agent ("I Know Who You Are") (uncredited)

Jacek Butrymowicz

Secret Agent ("I Know Who You Are") (uncredited)

Jerzy Czupryniak

Officer Questioning Kolicki ("I Know Who You Are") (uncredited)

Marek Dąbrowski

Fritz ("I Know Who You Are") (uncredited)

Henryk Dudziński

Soviet Lieutenant ("I Know Who You Are") (uncredited)

Mieczysław Gajda

Helmuth ("I Know Who You Are") (uncredited)

Andrzej Herder

SS Soldier / Hans Kloss (voice)

Andrzej Jędrzejewski

SS Officer ("I Know Who You Are") (uncredited)

Jerzy Kaczmarek

Bruno Dreher ("I Know Who You Are") (uncredited)

Juliusz Lubicz-Lisowski

Soviet Colonel ("I Know Who You Are") (uncredited)

Zygmunt Malawski

Heinrich Vogel ("I Know Who You Are") (uncredited)

Zygmunt Nowicki

German Gendarme ("I Know Who You Are") (uncredited)

Zbigniew Płoszaj

SS Soldier / Fritz ("I Know Who You Are") (uncredited)

Czesław Przybyła

Prison Barber ("I Know Who You Are") (uncredited)

Edward Radulski

Kloss' Cellmate ("I Know Who You Are") (uncredited)

Jan Rudnicki

Helmut Kloss ("I Know Who You Are") (uncredited)

Marek Sobczyk

Captain ("I Know Who You Are") (uncredited)

Bohdan Sobiesiak

Deciphering Lieutenant ("I Know Who You Are") (uncredited)

Ryszard Sobolewski

General's Adjutant ("I Know Who You Are") (uncredited)

Mirosław Szonert

SS Officer ("I Know Who You Are") (uncredited)

Jerzy Szpunar

Lothar Beitz ("I Know Who You Are") (uncredited)

Natalia Szymańska

Old Woman ("I Know Who You Are") (uncredited)

Jan Tesarz

Stedtke's Snitch ("I Know Who You Are") (uncredited)

Janusz Ziejewski

German Colonel ("I Know Who You Are") (uncredited)

Tadeusz Schmidt

Major Horst ("Top Secret") (uncredited)

Krystyna Feldman

Reil's Secretary ("Top Secret") (uncredited)

Andrzej Jurga

Partisan ("Top Secret") (uncredited)

Jan Koecher

Doktor Pulkowski ("Top Secret") (uncredited)

Małgorzata Lorentowicz

Kreisleiter's Wife ("Top Secret") (uncredited)

Tadeusz Ordeyg

Party Guest ("Top Secret") (uncredited)

Zdzisław Salaburski

Partisan ("Top Secret") (uncredited)

Tadeusz Teodorczyk

Mailman ("Top Secret") (uncredited)