Oliver tests the Vigilante Registration Act by outing himself at a press conference, praised by the general in charge. As feared, he's tortured in a secret prison to turn on his superhero friends. Tess helps work out the design from Luthor plans for an underwater top-security facility, build in sixfold. Aquaman 'A.C.' Arthur Curry and his new wife Mera discover and penetrate the one Oliver is held in, but the general rather starts auto-destruct. Clark remains cautious and flashes to the rescue but has to deal with a specific counter-measure.