A party of tourists -- including a state senator, a park ranger who was her one-time lover, a cantankerous professor, and an escaped convict -- are trapped deep inside the caverns of an unnamed national park, rescued briefly, and then caught in a second cave-in.
Dennis Cole
as Ranger Gene Pearson
Susan Sullivan
as Senator Kate Lassiter
Leslie Nielsen
as Joe Johnson
Ray Milland
as Prof. Harrison Soames
Julie Sommars
as Liz Johnson
Sheila Larken
as Ann Soames
Lonny Chapman
as Walt Charles
James Olson
as Tom Arlen
Ivan Bonar
as Doctor at Prison
David Westberg
as Larry Munson
Todd Martin
as Herb
Joseph Della Sorte
as Cooper
