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.
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Crew
Directors
> Quentin Lawrence (Director) > Monty Berman (Director of Photography) > Norman Harrison (Assistant Director)
Writers
> Jimmy Sangster (Screenplay) > Giles Cooper (Story) > George F. Kerr (Story) > Jack Cross (Story)
