Babylon Berlin (2017-) 
Colognian commissioner Gereon Rath moves to Berlin, the epicenter of political and social changes in the Golden Twenties.
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Babylon Berlin: Season 2 Season 2, Episode 1
The wonderful German tv series about 20s Berlin is back. Things come to an apotheosis. Try it out: it's on Netflix in US, CA & AU. Average 9,5 score on Rotten Tomatoes
Babylon Berlin: Episode 1 Season 1, Episode 1
Gereon Rath is the enigmatic new inspector who joins Berlin’s vice squad.
He is a First World War veteran from Cologne, but appears to be entangled in the capital’s criminal underworld.
Episode one’s opening scenes show flashes of Rath’s life both past and future: cavorting in nightclubs, fighting on the front lines, drowning underwater.
In present-day Berlin, he is charged with closing down a pornographic film set with his chief inspector, Wolter – a gruff, untrusting man.
Guardian Wikipedia Rotten Tomatoes 100% IMDB 8.4 On Netflix in US, CA and AU.