Alien (It Came from Outer Space)

These unnamed aliens are a spacefaring non-humanoid race with a rounded body, a large single eye and several tendril-like appendages. They seem to travel in spherical ships and are able to alter their appearance greatly, although this might to be an illusory (perhaps telepathic) ability, rather than physical shapeshifting. They also release clouds of smoke when they transform.

History
One ship of this species crashed on Earth in Arizona due to a navigational mistake, as they were heading to another planet. The aliens attempted to remain hidden and not draw much attention from Humans during the time they needed to fix their ship. Unfortunately, they had to kidnap some Humans in order to assume their form and replace them, so that they could infiltrate Human cities to gather the materials they needed. They wouldn't risk revealing themselves, as they were aware that Humans would be scared of them. They know their appearance is considered grotesque and that Humans have a tendency to destroy what they don't comprehend.

Despite their efforts to remain hidden, the aliens' presence was noticed and an angry mob was formed to kill them, but the aliens managed to fix their vessel and release the hostages in time and left Earth. It is possible that they will return some day, when humanity is deemed ready to make contact with them.

Appearances

 * It Came from Outer Space (1953)