The Alien Tyrannosaurus appeared in the 1978 movie called Planet of Dinosaurs. This predatory dinosaur was found to be native to its planet, noted to resemble early earth life of the Mesozoic but drastically slowed down in evolution. It was first encountered when a expedition team was chased by a alien stegosaurus, which the two engage battle. The alien tyrannosaur also feasted upon a rhedosaurus and small stegosaurid before finally dying to the lost humans.