The Day the Earth Stood Still (1951)

Plot:An alien lands and tells the people of Earth that they must live peacefully or be destroyed as a danger to other planets

Klaatu (Michael Rennie) is a gentlemanly outer-space alien who comes to earth in his flying saucer to send us Earthlings a very important message. Sadly, we shoot him on arrival and try to imprison him in a hospital room. He escapes and goes out among us to find the basis for our "strange, unreasoning attitudes." He takes a room in a boarding house, where he meets the widowed Mrs. Benson (Patricia Neal) and her young son (Billy Gray). The widow is being romanced by an insurance salesman (Hugh Marlowe), who later displays a lust for glory that endangers Klaatu – and thus the rest of the world. Klaatu is in better hands when he reveals himself to Professor Barnhardt (Sam Jaffe), a brilliant scientist and the best hope for the survival of Earth.
My respect for the movie dimmed sharply when I saw that the alien was not only a man, but a good looking man who spoke perfect English, but then won back my respect completely when it took the time to explain that his culture had learned about humans through intercepting radio transmissions over many years.The alien didn't give may details as to his physical condition, but scientists hypothesized that since he so closely resembles a human, he must have a similar environment to our own on his planet.
the robot looks silly, but when Gort opens its visor and we hear that unnerving theremin music, we don't care that this supposedly metallic creature bends like Styrofoam at the knees.
Michael Rennie makes up for Gort's deficiencies. He gives what easily could have been a humorless, sanctimonious character a quiet, graceful authority. His slightly otherworldly looks add to the illusion; and Neal as Mrs. Benson completes it by reacting to him with obvious respect – even when she fears him.
every shot is strikingly composed and brings out the maximum dramatic potential of the story. The sense of rhythm and pacing is beautifully suspenseful.
7.5/10