This is bad. A certain astronaut, flying over Saturn, was exposed to radiation and began to disintegrate before his eyes. The citizen was hospitalized, escaped, and took his revenge on mankind.
One plus here is the special effects of Rick Baker, future master of all this. And then there's also when the falling apart astronaut wanders around the neighborhood, old conversations with the space center are heard in his head, preserved apparently in his memory. That's a good thing.
The rest is dull and, in places, nauseating trash. Dull, because there is a lot of pseudo-scientific talk to prolong the timing. Nauseating, because the citizen gradually falls apart, naturalistic. Well, there are some strange scenes, like the nurse's face smashing the door glass or the children smoking cigarettes and going to play doctor. It's the '70s baby. For true thrash connoisseurs.