In the animated series, the pair are anthropomorphic animal superheroes without known secret identities (the green-eyed caped crimefighter and his squeaky-voiced companion are usually addressed as simply "Courageous" and "Minute") who live in the Cat Cave. When summoned via the Cat Signal over their television set, Courageous Cat and Minute Mouse race to the scene of the crime in their sleekly feline red Cat Mobile which can convert into both the extendable-winged Cat Plane and submersible Cat Boat and thwart the criminal plots of various villains who threaten Empire City.