Action Comics #39

In "The Radioactive Man," a tragic lab accident claims Brett Bryson, leaving his employers free from blame despite the deadly fallout. When a mysterious hooded figure begins robbing jewelry stores—leaving victims dead from radium burns—Superman finds himself wrongly accused, forcing him to prove his innocence before Sgt. Casey can arrest him.

In "The Jailed Star," Midwest College's baseball team faces a crisis when their star pitcher, Jerry Hope, is sidelined by injury, forcing rookie Pep to step in. With the game on the line, gamblers Odds Renaldi and Monk see their chance to manipulate the outcome—just as the pressure mounts and the stakes rise.

In "Escape from the Palace," Jon Valor—disguised as trader Noah Scott—steps into the gilded halls of a Spanish royal ball, unaware that his supposed ally, Captain Don De Avila, has set a trap to capture him and win back the king’s favor. With the palace walls closing in, Jon must outwit betrayal and navigate a web of deception before his cover is blown.

In the frozen reaches of Glencarren, the Three Aces take up the desperate mission to deliver a vital serum after their comrade Angus is shot mid-flight. With the epidemic spreading and the trail of the stolen medicine growing cold, the team must push through treacherous terrain to uncover the truth behind the theft.

In "Vs. the Fifth Columnists," Mr. America takes on a shadowy espionage threat after intercepting a kidnapping and uncovering a mysterious insignia on a thug’s jacket. Using the clue, he infiltrates a spy camp where he teams up with reporter Doris Dare, who warns him that a dangerous package must be stopped before it’s mailed.

Congo Bill is back in action in 1941, tracking a mysterious submarine base along the North African coast with the help of a British officer in Cairo. As the war rages, he must navigate treacherous terrain and hidden dangers to uncover the secret base before it strikes again.

In "The Zin Diamond," Zatara, the master magician, finds himself in the exotic kingdom of Patona, where his dazzling performance earns the trust of the queen. When she entrusts him with transporting the legendary Zin Diamond to the Capital Bank of America, a shadowy figure named Bem sets a trap, determined to eliminate Zatara and claim the gem for himself.