The depletion of the earth's ozone layer causes animals above the altitude of 5000 feet to run amok, which is very unfortunate for a group of hikers who get dropped off up there by helicopter just before the quarantine is announced.

• DirectorWilliam Girdler
• Release13 May 1977
• Genre
  Science Fiction / Horror
• Duration1h 37m
• Budget$1,200,000
• Revenue?
• Rate
  

  5.2
  69 reviews
• Productions

  Montoro Productions Ltd., Mid-America Pictures, Film Ventures International