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.
Alan Brooks
Sarah Pilgrim
Anne Pilgrim
Philip Truscott
Prof. Crevett
Mayor Klein
Hans
Brett
Dewhurst
Wilde
First Villager
Second Villager
First Student Climber
Second Student Climber
Carl
Fritz
The Mother
The Child
The Spotter Pilot
Voice of Beheaded Climber Jim
Evacuated Villager (uncredited)
Evacuating Villager (uncredited)
Evacuated Villager (uncredited)
Stationmaster (uncredited)
Evacuated Villager (uncredited)
Mountain Rescue Stretcher Bearer (uncredited)
