Babylon Berlin Season 4, Episode 4 pivots toward the grim underbelly of 1930s German justice as the "White Hand" vigilante group emerges and Gereon Rath investigates corruption in professional boxing, according to IMDb and viewer discussions. The episode highlights the arrival of gangster Abraham Goldstein and explores deepening moral decay, with the series continuing to explore the twilight of the Weimar Republic prior to its 2026 final season Wikipedia , MHz Choice . Watch the episode on platforms like MHz Choice or Prime Video .