at the same time, when velma attempts to analyze the footprint in the clay, the clay suddenly comes to life and attacks. after overcoming it with a bat-dehydrator, mystery inc. deduces the villain's true identity for themselves: clayface. they try to inform batman, but learn that he has been captured by the cloak; and after equipping themselves with the old costumes and gadgets of batman's former sidekicks, they arrive just in time to stop the teleporter and incapacitate clayface with the dehydrator. defeated and exposed, clayface admits that he restored the machine for the riddler and stole the isotopes to power it, in return for a cure against the gradual decay of his body. the riddler sitting in arkham is revealed to be a clay decoy, and the question is unmasked as the real riddler, who had taken question's place during the fight before the analysts' meeting.