Watch The Day Mars Invaded Earth

The Day Mars Invaded Earth is a 1963 American science fiction film. It is the story of Martians that replace a scientist and his family. It is a singularly uneventful invasion as it develops that Mars is replacing human scientists around the world to falsify the data being returned by probes to the red planet. The aliens do this in an effort to keep their existence a secret and prevent an invasion of their world. When the aliens are discovered by a scientist, the resulting confrontation could lead to the war the Martians have been trying to avoid.