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Story
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.
Credits
Jimmy Sangster
writer
Monty Berman
producer
Forrest Tucker
Alan Brooks
Jennifer Jayne
Sarah Pilgrim
Janet Munro
Anne Pilgrim
Laurence Payne
Philip Truscott
Warren Mitchell
Prof. Crevett
Frederick Schiller
Mayor Klein
Colin Douglas
Hans
Andrew Faulds
Brett
Stuart Saunders
Dewhurst
Anne Sharp
The Mother
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