The series centres around the investigations of Police Lieutenant Sławomir Borewicz. Each episode features a different case being solved by Borewicz.

Bronisław Cieślakas Sławomir Borewicz
Zdzisław Tobiaszas Major Wołczyk
Zdzisław Kozieńas Antoni Zubek
Jerzy Rogalskias Waldemar Jaszczuk
Ewa Florczakas Ewa Olszańska
Hanna Dunowskaas Anna Sikora
Krzysztof Majchrzakas Michał
Leon Pietraszkiewiczas Kazimierz Czudraś
Zofia Merleas Kazimierz Czudras' Wife
Wacław Kowalskias Dołmontowicz
Krzysztof Szmagier