"Two friends think that they've discovered a dangerous spy hiding in a mine shaft."
Damian Damięcki
as Karlik Rudniok
Maciej Damięcki
as Franek Miksa
Michał Bustamante
as Stefan Gola
Łukasz Żuławski
as Kryza
Ludwik Benoit
as Miksa (Franek's father)
Barbara Fijewska
as Miksina (Franek's mother)
Gustaw Holoubek
as Sądej
Zbigniew Józefowicz
as Rudniok (Karlik's father)
Jan Koecher
as Bolesławiec
Stanisław Milski
as Headmaster Zajączkowski
Kazimierz Opaliński
as Kropa
Jarema Stępowski
as Sztelmach
Kazimierz Szubert
as Kupść
Sławomir Oszczygieł
as
Arkadiusz Hoffer
as Stachurka
Jerzy Żołnierkiewicz
Włodzimierz Łuszczykiewicz
Zofia Bohdziewicz
Maria Szaflarska
Maciej Cichecki
Zbigniew Cybulski
as Miner (uncredited)
Henryk Hunko
as Man with a Flag (uncredited)
Ignacy Machowski
as School Inspector (uncredited)
Irena Szymkiewicz
as Woman in an Office (uncredited)
Wanda Jakubowska
Supervising Art Director
Krystyna Cękalska
First Assistant Director
Stanisław Daniel
Assistant Director
Tadeusz Chmielewski
Czesław Świrta
Camera Operator
Wacław Dybowski
Assistant Camera
Ludwik Pełka
Zdzisław Kielanowski
Art Direction
Jozef Ciecwirek
Lighting Technician
Ludwik Jerzy Kern
Lyricist
Stanisław Kochanek
Sound Assistant
Maria Lasnowska
Assistant Makeup Artist
Mieczysław Wajnberger
Production Supervisor
Tadeusz Slaby
Unit Manager
Stanislaw Moroszkiewicz
Marek Dobrowolski
Edmund Niziurski
Novel
Kazimierz Wawrzyniak
Director of Photography
Jan Grandys
Production Design
Stanisław Skrowaczewski
Music
Leonard Księżak
Sound
Halina Nawrocka
Editor
Tadeusz Schossler
Makeup Artist
Mirosława Garlicka
Assistant Editor
Wadim Berestowski
Director
Writer
