Originally, this movie was going to be called The Unseen . Well, sort of. This is Phil Tucker's other tale of healthy young scientists vs. alien invaders with a goofy radio. No one worries about what's eating a teenager until it's too late. And in this case, it ain't teen angst.
Several stories warn about the horrors of living in a totalitarian society.
Only problem is, some of these stories are so poorly done, they make the totalitarian bad guys and their world of pure order look good. There was a time when doing a weird tale at Hammer was a new thing. Frank Henenlotter showed a lot of promise with his dreamlike Basket Case and hallucinatory Brain Damage . This movie is neither. During the '50's and early '60's, there were several films about the end of the world, but that was OK, because it was survivable.