Directed by Fritz Lang
Written by Thea von Harbou
IMDB

Freder, the son of city planner Joh Fredersen, is shocked to learn that his family's fortune is built upon the labor of workers. He decides to trade places with a worker in order to understand exactly what it's like to be one of them. After his shift, he is invited to hear an oration from Maria, where she tells of a mediator between the "hands and heart" of the machine. It's him, obviously, and he falls in love with Maria.
Joh Fredersen doesn't like the way Maria is whipping up his workers and making secret plans with them. He goes to a mad scientist, Rotwang, and they decide to use her likeness on a robot. They kidnap her and use magic or whatever to transform the robot into looking like her. The plan is to have her tell the workers keep working, but Rotwang has other plans, and he has her tell the workers to revolt.
This movie is epic. I watched the complete version that is 148 minutes, as opposed to the 114 minute cut that had been going around until they found a full print in Argentina. The film originally debuted in Berlin at 153 minutes. So this is probably as good as it will ever get. There are a few missing scenes which are filled in by a description of them. I cannot imagine trying to make sense of a 114 minutes cut of this movie. They would have to leave out so much important plot elements.
This film is a true classic. I would not be able to truly respect a person who told me they did not like this film. Visually, it is amazing. The special effects are pretty fantastic for 1927 and the city of Metropolis is spectacular. The acting is silent film acting, so it kind of sucks. That is to be expected and you can't fault the film because of it. It is a small obstacle to overcome.
I highly recommend this film to anybody who has never seen it and has an interest in cinema. This film is history. It has an amazing story in how they found the missing footage. It is a fantastic sci-fi epic. Watching it is an event.

10/10