The show is based on the best-selling novel Der Nasse Fisch (The Wet Fish) by German writer Volker Kutscher, the first of his Gereon Rath novels. Set in 1920s Berlin, they follow police detective Rath, who is transferred to Berlin and tries to solve crimes in a city torn by social and political upheaval in the years leading up to Adolf Hitler's rise to power.
Sorry, no info about the next episode of Babylon Berlin is available yet.
The TV show is either in vacation or waiting to start their new season. When information about future episodes becomes available, it will be posted here.