Mysterious disappearances plague a Swiss mountain. Meanwhile, a clairovoyant woman sees visions, and a mountain observatory detects a radioactive cloud. All are connected, but how?
Not quite on the level of a Quatermass entry, but still a decent film, with good taut direction from Lawrence, and some fine performances, especially Mitchell. Hardly deserving of the low rating it has on IMDb. Since it was the first film given the MST3K treatment, that probably accounts for it. Because if puppets mock a film, it must totally suck, right?