Walter Hewitt, a loner scientist, develops a ray that gives him the abilities of animals. Unfortunately something goes wrong and a gorilla gets his intelligence and forces him to commit crimes. Batman battles the gorilla but it uses the ray to get Batman's abilities. The gorilla makes a bomb that will go off if he is defeated but Batman figures out how to stop the bomb from exploding.
More Details...Detective Comics #339 VF Batman & Robin cover
Walter Hewitt, a loner scientist, develops a ray that gives him the abilities of animals. Unfortunately something goes wrong and a gorilla gets his intelligence and forces him to commit crimes. Batman battles the gorilla but it uses the ray to get Batman's abilities. The gorilla makes a bomb that will go off if he is defeated but Batman figures out how to stop the bomb from exploding.