The first of six episode compilations of the TV show released theatrically, featuring episodes 1 and 3. In 1941, Polish soldier Stanisław Kolicki escapes German captivity only to be mistaken for the dashing Abwehr lieutenant Hans Kloss and recruited by the Soviets as their secret agent J-23. Under deep cover behind enemy lines, he feeds crucial intelligence to the Red Army while outwitting suspicions and dueling wits with the formidable SS officer Hermann Brunner.
Stanisław Mikulski
as Hans Kloss / Stanisław Kolicki
Seweryn Butrym
as General Wierlinger ("I Know Who You Are")
Mieczysław Stoor
as Sturmfuhrer Hans Stedtke ("I Know Who You Are")
Krzysztof Chamiec
as Sturmbannfuhrer Lothar ("I Know Who You Are")
Janina Borońska
as Irena ("I Know Who You Are")
Alicja Zommer
as Doctor Marta Becher ("I Know Who You Are")
Wiktor Nanowski
as Officer Interrogating Kloss ("I Know Who You Are")
Andrzej May
as Jacek ("I Know Who You Are")
Wanda Koczeska
as Basia Reczko ("Top Secret")
Igor Śmiałowski
as Erwin Reil ("Top Secret")
Leon Niemczyk
as Rioletto ("Top Secret")
Emil Karewicz
as Hermann Brunner ("Top Secret")
