The US military is running a test for a special type of radio transmitter, to be used to communicate with submarines, in a deep system of underground caves in Central America. When the signal from one of the transmitters suddenly disappears, a team of soldiers led by Major Elbert Stevens and cave specialists led by Rupert 'Wolf' Wolfsen including scientist Leslie Peterson are sent in to find out what happened. Exploring deep underground, they stumble upon a tribe of albino cave-dwellers who have apparently been isolated from the rest of the world for thousands of years. The cave-dwellers are hurt by radio frequencies and are able to see in infra-red frequencies, tracking the explorers by their body heat.
Cast
Robert Powell
Rupert 'Wolf' Wolfsen
Timothy Bottoms
Major Elbert Stevens
Lisa Blount
Leslie Peterson
Anne Heywood
Frieda Shelley
Richard Johnson
Ben Gannon
A.C. Weary
Lt. George Barwell
Liam Sullivan
Lemurian Elder
Jackson Bostwick
Hunter Prime
Richard Beauchamp
Santos Arias
Gary Carlos Cervantes
Hector Lopez
Dick Curtis
Lemurian
William Gribble
Sgt. Neumann
Carl Spurlock
Major Castillo
Jason Laskay
Hunter Second
Tim Powell
Jim White
David Avery
American Soldier
Rick Davis
Mercenary
Janine Stamler Jordan
Mercenary
Kenny Moore
Lemurian
Brian Stevens
American Soldier
Ned Vaughn
American Soldier
Pamela Hallisey Hiss
Lemurian (uncredited)
Crew
Don Sharp
Director
Robert Vincent O'Neil
Screenplay
Christy Marx
Screenplay
Freddie Francis
Story
John R. Bowey
Editor
Virgil L. Harper
Director of Photography
Victoria Plummer
Production Coordinator
Mel Pearl
Executive Producer
Don Levin
Executive Producer
Sandy Howard
Producer
Robert D. Bailey
Producer
Jeffrey M. Sneller
Associate Producer
Jim Garrard
Casting
Pamela Hallisey Hiss
Makeup Artist
David Lee
Sound Mixer
Craig Felburg
Sound Mixer
Bret Culpepper
Special Effects
Michel Rubini
Original Music Composer
Denny Jaeger
Original Music Composer
Clarke Coleman
Stunts
Mike Bledsoe
Stunts
Doug Bledsoe
Stunts
Ron Bledsoe
Stunt Coordinator
Stephen Marsh
Art Direction
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