Finally looking at the map of Berlin everything seems so close together, the Hansastudios just a stroll down from Potsdamer Platz, then Hauptstraße 155 a stroll down from there, but more likely a M48 bus from Alex. And then both King George and Caligula are walking distance from there. So bus all the way to Alex for Rosa Lux Kino, then from same place get M48 all way back to Bowie’s apartment. Then I can walk to King George or Caligula. Try Alte Nationalgalerie before Roxa Lux.