Original film footage from Tharka the Superwoman’s famous trip to Earth from her home planet of Zor years earlier was stolen — but why? Tharka learns the reason two years later, when her arch-nemesis Doctor Computeer declares herself Empress of Zor and forces Tharka to battle two super-powered foes from Earth — Captain Challenge and Muscleman! Can Tharka outwit her enemy and save her world before it’s too late?
A new vigilante killer arises, targeting old, retired super-villains for extermination, with an alarming success rate! Meanwhile, a new super-villain begins humiliating members of the Justice Society of America, one by one! Can the JSA discover the truth about the Sunset Killer and stop the crime spree of Black Nemesis before their reputation is completely ruined? Guest starring Infinity Inc!