"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)
Tadeusz Slaby
Unit Manager
Krystyna Cękalska
First Assistant Director
Mieczysław Wajnberger
Production Supervisor
Ludwik Pełka
Assistant Camera
Czesław Świrta
Camera Operator
Wacław Dybowski
Jozef Ciecwirek
Lighting Technician
Maria Lasnowska
Assistant Makeup Artist
Stanislaw Moroszkiewicz
Tadeusz Chmielewski
Assistant Director
Stanisław Daniel
Wanda Jakubowska
Supervising Art Director
Zdzisław Kielanowski
Art Direction
Ludwik Jerzy Kern
Lyricist
Stanisław Kochanek
Sound Assistant
Marek Dobrowolski
Stanisław Skrowaczewski
Music
Kazimierz Wawrzyniak
Director of Photography
Halina Nawrocka
Editor
Edmund Niziurski
Novel
Tadeusz Schossler
Makeup Artist
Mirosława Garlicka
Assistant Editor
Jan Grandys
Production Design
Leonard Księżak
Sound
Writer
Wadim Berestowski
Director
