Overview
Lost Continent is a 1951 American black-and-white science fiction film drama from Lippert Pictures, produced by Jack Leewood, Robert L. Lippert, and Sigmund Neufeld, directed by Sam Newfield (Sigmund Neufeld's brother), that stars Cesar Romero, Hillary Brooke, Whit Bissell, Sid Melton, Hugh Beaumont and John Hoyt.
An expedition is sent to the South Pacific to search for a missing atomic-powered rocket in order to retrieve the vital scientific data recorded aboard. On an uncharted island they discover more than their rocket, now crashed atop a mysterious plateau, they find a lost jungle world populated by prehistoric dinosaurs.
Plot
Maj. Joe Nolan is the head of a South Pacific expedition to retrieve an atomic powered rocket that has vanished without a trace. His fellow serviceman and pilot, Lt. Danny Wilson, is also an expedition member. Aircraft mechanic Sgt. William Tatlow has also been recruited. The expedition includes the three scientists who helped build the rocket.
Their transport aircraft mysteriously crash-lands on a remote, unknown tropical island in the area where the rocket was lost on radar. Only two occupants are left on the island, a native woman and her young brother. The woman indicates something fell from the sky atop the forbidding, cloud-shrouded plateau that dominates part of the island. The rocket's fiery arrival caused the rest of the native population to abandon the island.
From Wikipedia (CC BY-SA 4.0).