The Killers from Space is a B&W Science-Fiction movie from 1954.
The producer and director of the movie is W.Lee Wilder (brother of the more famous Billy Wilder).
Starring: Peter Graves, Barbara Bestar
Plot:
A group of aliens wants to conquer the Earth and for this purpose, they take over the body and spirit of an atomic scientist. They use him as a spy and saboteur. When Graves becomes aware of this, he tries to warn humanity, but no one believes him. Graves decides to sacrifice himself to stop the aliens at all costs.
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