It Conquered the World(1956)
Scientist Dr. Tom Anderson makes contact with an alien called Venusian through radio transmission. Dr. Anderson is told that the alien only wants to bring peace to the human by getting rid of human emotions but the alien intends on taking over. The only person that escapes the mind control is Dr. Anderson's friend Dr. Nelson who must escape the aliens mind control and prevent the alien invasion.
Directed by the legendary Roger Corman.
The film also appeared on the show Mystery Science Theater 3000, episode 311.
The film would also be unofficially remade by Larry Buchanan as Zontar, The Thing from Venus.
It Conquered The World & The She Creature Double Feature Trailer