Ardello

A "weird, nonmetallic robot," the "chief of robot detectives" in some distant, alien dimension, who journeys to the earthly dimension in May 1960 accompanied by an incredible "electronic bloodhound" - an extradimensional "creature" that has been "trained to track down criminals by tuning in on their brain waves" - in a determined effort to apprehend Batman, whom Ardello mistakenly believes to have been re­sponsible for invading his home dimension and making off with a powerful extradimensional weapon "de­signed to transform matter" and capable of "terrible damage."

For a time, Batman and Robin find themselves the objects of a deadly manhunt by Ardello and his electronic bloodhound, but the extradimensional lawman ultimately comes to the realization that Batman is a crime-fighter like himself and that the earthling responsible for the weapons theft could only have been an impostor in a Batman costume.

Working together, Batman. Robin, and Ardello finally recover the stolen weapon and apprehend the real thief - criminal Ed Collins, alias Gimlet - who had journeyed to ArdelIo's dimension disguised in a Batman costume with the aid of an experimental "dimensional machine" created by a prominent Gotham City scientist.