Aquaman and Aqualad pursue a masked saboteur who is targeting the Leland Factory for polluting the ocean. Meanwhile, in Atlantis, the Ocean Master wants to contact Aquaman.; When bank robber Frankie Barron is killed by a security guard during a holdup, he returns as a ghost to help other crooks rob the same bank.; Alaktor projects Hitler's, Nero's, and Dillinger's minds into Superboy's, Mon-El's, and Ultra-Boy's bodies. Saturn Girl tricks them into defeating each other, and the Legion forces Alaktor to undo the process.; The musician Stradivous, who can hypnotize anyone with his clarinet, works with Jennings to hijack a shipment of gold.; Agent Pinkeye is revealed as the killer of Dimitri Dervish and is captured by Plas and Woozy.; Rejected applicant Alaktor steals a Time Bubble and recruits the help of Nero, Dillinger, and Hitler to battle the Legion.; The Legion of Super-Heroes finds out about the Subs, and holds a contest to induct the winner into the Legion of Super-Heroes. Polar Boy passes the first test.; Night Girl defeats the tyrant Sun Woman, and the other Subs succeed at their tasks, except Stone Boy, who quits. But when Saturn Girl reveals that he only quit in order to keep bystanders from being injured, Stone Boy wins the contest. He surprises everyone by refusing the honor, not wanting to leave his friends in the Subs.; The Chameleon Stone, a magical artifact that can change its shape to anything its holder desires, is stolen by Ravar and used to fight Captain Marvel.