Percival Popp tries to worm himself into Corrigan's cases so that he can prove fictional detective's methods really work. Meanwhile, the Spectre has to cure mad scientist Mortimer Crandall of his evil tendencies by taking him to the Nebula of Truth.; Mr. Who uses his "Solution Z" to adapt himself to any danger, including taking over, in disguise, as the city Mayor.; The Voice threatens to silence the city forever unless he is paid 10 million dollars.; Captain Black Jack, a modern-day pirate who takes advantage of the nations at war in order to plunder ships, along with his gang, steals a yacht full of passengers. Aquaman saves the ship's captain and defeats the Black Jack's gang, but is surprised by a gas pump, knocking him unconscious. Refusing to join the gang, Aquaman has an anchor placed around his neck and he is thrown into the sea, but escapes in time to catch a torpedo launched by Black Jack to destroy the yacht. Aquaman re-directs it towards the pirate's ship, which explodes, presumably killing Black Jack in the process.; Dr. Clever is a swindler, and one of his plans is convincing people that he can extract gold from seawater. He's stopped by Johnny Quick.; Larry and Sandy investigate the murder of a race horse.