Der Alte plot
Chief Commissioner Köster, "der Alte", solves cases in his own way, often on the edge of the law. For example, he allows himself to be held hostage to pick up an underworld figure or becomes an extortionist himself. Teamwork is not really his thing, but when the need arises, he can always rely on his assistant Heyman. After the Köster period comes Chief Commissioner Kress, who, unlike Köster, is a team player. Because of his calm and sensible, but decisive way of working, the criminals under him also have nothing to laugh about. After Kress comes Chief Commissioner Rolf who is succeeded by Chief Commissioner Richard Voss.