On the platform at Bahnhof Zoo, all the train carriages belong to the Deutsche Bundesbahn (DB), the West German Federal Railway. But Zoo Station, and all the railways in West Berlin, were operated by the East German railway, Deutsche Reichsbahn (DR).
Right at the beginning. One private jet, no registration at all, passengers partying and wearing no seat belts, driven by some obviously demented pilot into a huge dark cumulus nimbus with plenty of room to divert. Stopped watching right there. Please respect viewers' intelligence.
In the very first scene of the series, David Bowie's jet appears to be a Gulfstream G550, which entered service in 2004. It has features including winglets and high-bypass jet engines that were not available on any aircraft of its type at the time.