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.
Ranger Gene Pearson
Senator Kate Lassiter
Joe Johnson
Prof. Harrison Soames
Liz Johnson
Ann Soames
Walt Charles
Tom Arlen
Doctor at Prison
Larry Munson
Herb
Cooper
Jack Miller
Ray
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