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 (Cesar Romero) 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 (Chick Chandler), is also an expedition member. Aircraft mechanic Sgt. William Tatlow (Sid Melton) 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 (Acquanetta) 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. Expedition member Stanley Briggs (Whit Bissell) dies accidentally on the steep ascent up the escarpment. After long stretches of rock climbing, the expedition emerges from what turns out to be a toxic gas cloud cover. They discover a lush, prehistoric jungle inhabited by various dinosaurs and a large field of uranium, which is what disabled their electronic tracking equipment. They come upon a Brontosaurus, which attacks Robert Phillips (Hugh Beaumont) as he retreats up a tree. Nolan and Wilson open fire, but they quickly discover that the dinosaur's thick hide absorbs bullets with little effect. Later that night they set up camp. When Nolan awakes, he finds Phillips and Russian scientist Michael Rostov (John Hoyt) gone. Phillips has gotten himself stuck in a large rock crevice near a Triceratops. Nolan accuses Rostov of arranging the accident on purpose, but Rostov insists that he was helping Phillips. The Triceratops nearly attacks the group, but another makes a challenge and the two dinosaurs fight to the death. Nolan is convinced that