future, metropolis, class society, man vs machine, underground world, tower of babel, based on novel or book, inventor, dystopia, delirium, mad scientist, prophet, steampunk, grim reaper, black and white, robot, destruction, silent film, nostalgic, expressionism, seven deadly sins, depravity, partially lost film, mob justice, downtrodden, saviour, social unrest, german expressionism, mediator, cautionary, dramatic, suspenseful,