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")

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

Jerzy Balbuza
Soviet Intelligence 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)