With Season 4 and the climactic production of Season 5, Babylon Berlin shifts into its darkest, most turbulent chapter. Adapting Volker Kutscher’s celebrated novel Goldstein, the narrative leaps into the freezing winter of 1930–1931, where the Great Depression has wiped out Germany's middle class, filling Berlin's streets with millions of unemployed, desperate citizens.
The era of joyful jazz improvisation is over; in its place is brutal street combat between communist Red Front fighters (Rotfrontkämpferbund) and the brownshirted stormtroopers of Hitler's SA.
The Transatlantic Mob War: Abraham Goldstein
The central catalyst of Season 4 is the arrival of Abraham "Abe" Goldstein (Mark Ivanir), an enigmatic American hitman associated with the Jewish-American syndicate Murder, Inc. Traveling from Brooklyn to Berlin to recover a stolen heirloom diamond, Goldstein's presence destabilizes the delicate truce between Berlin's organized crime syndicates—the notorious Ringvereine (formal brotherhoods of ex-convicts) led by the phantom-like "Armenier" (Mišel Matičević).
The collision between American prohibition-era firepower and traditional Berlin underworld codes demonstrates how international organized crime intersected with political instability:
- The Boxing Ring as Warfare: The brutal, prize-fighting matches held in subterranean warehouses become the staging ground where mob bosses and corrupt industrialists broker backroom deals.
- Gereon Rath's Undercover Descent: Tasked by intelligence agencies to infiltrate the stormtroopers, Rath dons the brown uniform of the SA—a terrifying moral descent that strains his relationship with Charlotte Ritter to the breaking point.
The Stennes Revolt and the Crumbling Republic
The historical brilliance of Season 4 lies in its dramatization of the Stennes Revolt (April 1931), a violent mutiny within the Berlin SA led by Walther Stennes (Hanno Koffler) against Adolf Hitler and Joseph Goebbels. By exploring the fierce ideological split between northern socialist-leaning stormtroopers and Munich's party leadership, the series avoids simplistic historical caricature, illustrating the chaotic internal rivalries that preceded the Nazi consolidation of power.
As the series heads into its final season, the impending tragedy is palpable. Gereon Rath, Charlotte Ritter, and Ernst Gennat are fighting to solve individual murders in a nation that is rapidly preparing to commit industrialized murder on a continental scale.