- Country: UK, USA
- Genres: Action, Horror
- Release: 1985-02-04
- Director: Don Sharp
- Writers: Freddie Francis , Christy Marx , Robert Vincent O’Neil
- Language: English
- Stars: Robert Powell , Timothy Bottoms , Lisa Blount , Richard Johnson , Anne Heywood , A.C. Weary , Jackson Bostwick , Richard Beauchamp , William Gribble , Carl Spurlock
- Runtime: 88 min
- Awards: N/A
- AKA: What Waits Below (United States of America) , Secrets of the Phantom Caverns , Tajemnice jaskiń Phantoma (Poland) , SF謎の地底人発見 (Japan) , Nicaragua Code (Sweden) , Das Geheimnis der Phantomhöhlen , What Waits Below (United Kingdom) , Le secret des cavernes oubliées (Canada) , Hemmelig mission i junglens dyb (Denmark) , Pirullinen pimeys (Finland) , What Waits Below , Peligro escondido (Spain) , Perigo na Montanha (Brazil) , El secreto de las cavernas fantasmas (Mexico) , Что ждёт внизу , Cavernas fantasmas (Spain) , Secrets of the Phantom Caverns (Australia) , What Waits Below (France, French Republic) , Fantomgrottornas hemlighet (Sweden) , O Segredo da Caverna Fantasma (Portugal, Portuguese Republic)
- Plot: The U.S. government has been using deep caves in Central America as bases for a special type of radio transmitter used for communicating with submaries. When the signal from one of these transmitters suddenly disappears, a team of soldiers and cave specialists is sent in to find out what happened. After some exploring deep underground, they stumble upon a tribe of albino cave dwellers who have been isolated from the rest of the world for thousands of years.
- IMDB:tt0088392
What Waits Below Cast · · · ALL
Don Sharp
Director
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
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
Ned Vaughn
American Soldier
Pamela Hallisey Hiss
Lemurian (uncredited)