Oddball horror flick about a woman (Janis Wilson) who is petrified of cats, thinks she is being pursued by a giant catlike thing, and spends most of the film in a catatonic state. Her father, played by Ralph Morgan, is engaged in research with Onslow Stevens. They have the brilliant idea that they can illuminate internal organs. Because, don't we want everyone to see what's inside our intestines? Somehow this research involves experiments on cats, which, like everything else in the film, remains unexplained. Down the hall, Eduardo Ciannelli is also working on an experiment. He is trying to prove he can do a German accent. His associate, played by John Baragrey, has fallen for Wilson, much to the chagrin of Onslow's assistant, played by the icily cold June Vincent.
Now that we have all the players, it's on to the plot. Several characters go belly up, apparently clawed to death. Is there some kind of cat creature on the prowl? Richard Lane shows up as a detective, doesn't bother to show anybody his credentials, and yet everybody answers his questions. Perhaps he should be on a Senate committee. In the finale, we learn the killer's identity, if you hadn't already figured it out 5 minutes into the film.
The photography is pretty good, with effective use of shadows. And the film is atmospheric, in the same sense that a solid waste disposal plant is.