Featuring unbelievable special effects, The Land Unknown is a frightening adventure from the Golden Age of Science Fiction. A Navy expedition led by Commander Hal Roberts (Jock Mahoney) is sent to explore a mysterious warm-water region shrouded in the ice of Antarctica. When a fierce storm drives them into a cloud bank, their helicopter is disabled and they encounter a hot, tropical landscape of prehistoric terror! Untouched by the Ice Age, a 20th-century Mesozoic era awaits them, complete with ferocious dinosaurs and carnivorous plants. When their female journalist is captured, Commander Roberts remains their only hope of escape from The Land Unknown. - Navy scientist, newswoman and copter pilot find dinosaurs.