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.

Christopher George
as Steve Buckner

Leslie Nielsen
as Paul Jenson

Lynda Day George
as Terry Marsh

Richard Jaeckel
as Prof. Taylor MacGregor

Michael Ansara
as Daniel Santee

Ruth Roman
as Mrs. Shirley Goodwyn

Jon Cedar
as Frank Young

Paul Mantee
as Roy Moore

Walter Barnes
as Ranger Tucker

Andrew Stevens
as Bob Denning
Wuchak
***What if animals went batty and attacked humans?*** Animals at high altitudes go crazy in the Sierra Nevada Mountains due to exposure to ultraviolet radiation, the result of depletion of the ozone layer. A dozen hikers regrettably get dropped off up there by helicopter just before the quarantin...