"Babylon Berlin" is a German television series based on the novels by Volker Kutscher. The series is set in the late 1920s during the Weimar Republic in Berlin, a time of political unrest and social upheaval. Volker Kutscher's novels, particularly "Der nasse Fisch" (The Wet Fish), which is the basis for the first two seasons of the series, follow the character Gereon Rath, a police inspector, as he navigates the complexities of crime and corruption in the city. The show captures the atmosphere of the era with its blend of historical events, detective fiction, and vivid portrayal of Berlin's vibrant but turbulent society.