It was created by Polish director and screenwriter Piotr Wereśniak and produced by MTL Maxfilm studio.

The three main characters were Adam Zawada, an experienced, tough cop, his younger colleague Marek Brodecki and Barbara (Basia) Storosz, an ambitious female officer who in the first season joins the team just after graduating.

Although none of the main actors had had star status before the series debuted, all three of them rose to prominence and popularity during the 5-year-long run.

Many of Poland's best known actors guest starred, usually playing roles of people involved in just one particular investigation.

The serial was one of the most popular in Poland: each week it had an audience of 4 million.