PG | | Adventure, Horror
A petroleum exploration expedition comes to an isolated island and encounters a colossal giant gorilla.
A second unit filmed the waterfall scene - the waterfall background used in the film was shot in Brazil.
OK, Boan, how much you got here?
Boan: About eighteen hundred.
Joe Perko: Eighteen hundred? What's going on?
Boan: There's Bagley.
Joe Perko: Hey, Mr. Bagley! Something's haywire. They only loaded me enough pipe to push one test hole. Less than two thousand feet.
Roy Bagley: Yeah, that'll be enough.
(at around 33 mins) When the shore party arrives at the ancient wall on the island, Jack changes the lens on his camera twice.
Jessica Lange received an "Introducing" credit, as this was her acting debut.
The three hour, two-part television version also includes:
$7,023,921 19 December 1976