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.
Quentin Lawrence | Director |
Jimmy Sangster | Screenplay |
Robert S. Baker | Producer |
Monty Berman | Producer |
Stanley Black | Original Music Composer |
Monty Berman | Director of Photography |
Henry Richardson | Editor |
Duncan Sutherland | Art Direction |
Les Bowie | Special Effects |
Eleanor Jones | Makeup Artist |