Up in the mountains, on Mount Trollenberg to be precise, a strange radioactive cloud is wandering out and men are dying in mysterious and horrific circumstances.
Alan (Forrest Tucker) and the Professor (Warren Mitchell) are investigating the deaths and other weirdness such as the dead acting under alien control. Meanwhile a young psychic (Janet Munro) has a strange psychic link to the events happening...
So its a typical 1950s film of the genre, scary aliens who spend much of the film unseen though when we do see them the special effects are rather lacking. It's a giant eye with tentacles!
