Top Billed Cast

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  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)
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  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)