This film stats out with the standard and fun 50's sci-fi formula. We ar treated to a thesis on the use of radar. Something foreign approaches Santa Monica (a beautiful beach community off the cost of southern California.) Then we are confronted by a stranger in a diving suite with pipes coming out of his helmet. It is only human nature that we should beat the snot out of him. But wait he defends himself. Could this deadly stranger have anything to do with the UFO? As he is tracked down and cornered by the authorities, he ditches his fancy suite and we are in for a surprise.
Not as much of a shootemup as it is a study of physiology.