Fiend Without a Face (1958)

"New Horrors! Mad Science Spawns Evil Fiends! ... Taking form before your horrified eyes!"

An American airbase in Canada provokes resentment from the nearby residents after fallout from nuclear experiments at the base are blamed for a recent spate of disappearances. A captain from the airbase is assigned to investigate, and begins to suspect that an elderly British scientist who lives near the base and conducts research in the field of mind over matter knows more than he is letting on..