The Caped Crusaders and Professor race one another to Mechanical City to retrieve a stolen secret formula on microfilm.; The Caped Crusaders battle a wily foe who can create illusions, which stumps Batman until he finds a way to combat these mirages with radar.; An animal trainer at a circus is arrested for robbing the box office since an ape provided a distraction. However, Batman seeks to prove the man's innocence, using the ape as a cowled assistant.