A United Nations investigator crosses paths with a pair of psychic sisters on his way to Trollenberg observatory in the Swiss Alps, which has been plagued by a series of mountaineer disappearances that may be related to a radioactive cloud at the mountain's south face.

Cast:Forrest Tucker, Jennifer Jayne, Janet Munro, Laurence Payne, Warren Mitchell, Frederick Schiller,

Genre:Horror, Science Fiction,

country:United Kingdom,

Production:Tempean Films,