the first dinosaur island is a newly constructed amusement park run by murray wilson hunt. at this park, batman and robin agree to be part of a mock big-game hunt held by mr. breach. during the hunt, murray is knocked out by a criminal named stephen chase who takes control of dinosaur island, having the mechanical dinosaurs and cavemen attack batman. eventually, batman and robin are able to turn the tide on mr. breach and capture stephen chase. afterward, batman gains a mechanical tyrannosaurus as a trophy and places it in the batcave.