Not Of This Earth

Paul Birch – Beverly Garland 1957
An alien is sent on a mission to Earth from the planet Davanna, where the population is dying as the result of constant atomic warfare. The alien assumes the appearance of a human, calls himself Paul Johnson and never allows himself to be seen without dark glasses. As Johnson’s assignment is to send samples of human blood back to Davanna for study and potential use in saving the planet’s citizens, he is systematically killing people at random and draining their blood with a machine he carries in an aluminum briefcase.

With Original Trailer