Gloria acquits herself with courage, coolness, and brains throughout her ordeal. In effect, she saves the human race! Give some credit also to man's best friend, several dogs, and to common folk armed with their Second Amendment pistols and rifles. They need to do their own defense because their police have been taken over, communications sealed and roads blocked. We see nary a state or federal man or woman in sight. We Americans can find a way even against monsters armed with ray guns that dissolve anything into a pile of random atoms.
Is this sci-fi noir? At least one reviewer says so: "Gene Fowler, Jr. directs the film as if it were a film noir where the usual gangsters and bank robbers have been replaced by humanoid aliens who donít like dogs." https://moviesandmania.com/2018/10/13/i-married-a-monster-from-outer-space-review-movie-film-sci-fi-horror-1958-overview-cast-plot/
I read that the high priests of the noir cult actually consider "Them" and "Invasion of the Body Snatchers" as film noirs. If so, why not this one?
The title doesn't reflect the intelligence and depth of this movie. It looks great in its 1.85:1 aspect ratio and sharp b/w images.