Watch FilmoFlix. A dash of nostalgia, then a shrug and self-irony: The portraits of Berlin subway stations in Berlin [Underground] begin in Schöneberg’s Regenbogenkiez only to evaporate towards Dahlem, the location of the Freie Universität. The western underground academically frittered away. The trees in Argentina are more exciting. And over and over, the unfathomable notebooks of Heinz Emigholz.