In one of the series in third season the character Zdravko Kisselov The hair was using cocaine in the bathroom of the bar. Interestingly, the substance that the actor Alexander Sano pulls through the nose were actually a homeopathic medicine. It managed to remove his cold, torture him during filming.
Rosen Gatsov - Kukata was so realistic character, that people stopped the actor Marian Valev on the street, offering him money and asking him to beat up a neighbour they hold a grudge against.
In real life actors Zachary Baharov (who plays Ivo Andonov) and Yavor Baharov (who plays Bardem in season 4) are brothers.
In real life the actor Ivaylo Zahariev, who plays the main character Martin ( the undercover cop) is a member of Protestant church, which is dedicated to taking care of drug addicts. "Take care of them with the idea to give them the Christian faith and that God gives us hope. These people have a place to share their problems, obtain if they want support." Says the young actor.