Babylon Berlin has been the most enjoyable TV viewing for a while. A three season drama steeped in the sleazy but vibrant world of the Weimar Republic. It weaves crime stories with political intrigue and the decadent night life of Berlin in the 1920s.

And yet – it seems compelling to watch because there’s a warning for our own time. Here was a democratic Germany in the 1920s. It had an elected parliament, trades unions, combative political parties of all colours and strong feminist, anti-racist and LGBT friendly aspects to its society. And yet – it all collapsed into Nazi tyranny by 1933.

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In Babylon Berlin, you get all the warning signs flashing big, bold and red. We get a constant sense that none of this is going to end well. Young people are joining the Hitler Youth. German Jews are being disparaged and insulted as sub-human and wicked. Democratic politicians are the subject of assassination plots. All the institutions of the state from the courts to the police, army and civil service are not just corrupt but appear to be employing murderers.

Weimar is fun. Weimar is cultured. But Weimar is also in constant crisis. And eventually, the embattled middle class will give their votes to Hitler. At the end of season three we see one reason why that would happen – the 1929 stock market crash. One police officer – a typical mediocre petit bourgeois – has been trading in stocks way beyond his means and conned into doing so by silver-tongued financial salesmen. A desperate man like him will turn to extreme political solutions.

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Hyper-inflation was another curse of that era. And I have a sheet of stamps I bought years ago from around 1924 that were printed on top of to change their value by adding six or seven noughts. In addition I have a bank note that was worth billions of Marks. No wonder Weimar tottered so badly throughout the 1920s.

But it was also a cultural nirvana. Great artists and authors flourished in Berlin at this time. In season three, the plot of Babylon Berlin centres on the filming of a movie in the German Expressionist style. In the Weimar era, the director Fritz Lang reigned supreme making such incredible films as Metropolis and Dr Mabuse. And if you can, watch the 1920 expressionist classic The Cabinet of Dr Caligari.

Yet it was all about to end. And maybe as our own society seems to be transitioning from post-war liberal democracy to something potentially more disturbing, Babylon Berlin resonates on many levels. I strongly advise you to watch it for yourself.

Meanwhile – here are some snippets from the incredible Metropolis!