A Caribbean construction crew frees two frozen dinosaurs and a caveman (Gregg Martell) unearthed by an undersea explosion. When lightning strikes, all three prehistoric creatures are revived. In short order, the tyrannosaurus rex begins a deadly rampage; the gentle herbivore befriends a small boy; and the caveman falls in love with a modern woman (Kristina Hanson). Irvin S. Yeaworth, Jr. ("The Blob") directed this 1960 film.