What is babylon berlin season 4 release date?

As an AI language model, I don't have access to information about future events or announcements. However, there have been no official announcements regarding the release date for Babylon Berlin season 4 yet. It is anticipated that the COVID-19 pandemic may have caused delays to the production schedule, so it is uncertain when the season will be released. Fans can follow the social media accounts of Babylon Berlin or the official website to stay updated on any news or announcements concerning the release date.