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.

Top Cast

Forrest TuckerAlan Brooks

Jennifer JayneSarah Pilgrim

Janet MunroAnne Pilgrim

Laurence PaynePhilip Truscott

Warren MitchellProf. Crevett

Frederick SchillerMayor Klein

Colin DouglasHans

Andrew FauldsBrett