King Dinosaur is a 1955 science fiction film starring William Bryant, Wanda Curtis, Douglas Henderson, and Patti Gallagher with narration by Marvin Miller. Apart from these five actors, anyone else who appeared in the movie did so via stock footage! King Dinosaur was made in seven days with borrowed equipment.
In the movie four astronauts in 1960 travel to a planet called Nova that has just entered Earth’s solar system.
The crew begins studying the planet to see if it’s suitable for a possible Earth colony. After first discovering normal Earth animals such as a kinkajou and an alligator, they soon encounter and battle giant insects, an enormous snake, prehistoric mammals, dinosaurs, and – on an island – the titular character, King Dinosaur, a putative Tyrannosaurus Rex.
Eventually, the scientists blow up the island with an atomic bomb, killing all of its inhabitants.