National Comics #35 (1943)

Professor Bump, having turned himself invisible through a secret formula, begins a series of daring thefts and espionage, targeting military plans at the Lambert Aircraft Company. As Uncle Sam and his sidekick Buddy investigate a string of unexplained disappearances and stolen documents, they set a trap at a company meeting—unaware that the invisible man is watching, waiting to strike again.

In the aftermath of a boxing match, the sudden death of prizefighter Sluggo Maloney leaves the crowd stunned—shot with a heavy-rifle bullet no one saw fired. When Chic Carter investigates, he uncovers a hidden diary revealing Maloney’s suspicions about his manager and a secret connection to a penthouse across the arena, leading to a shocking confrontation.

In the 1943 adventure "The Thing from Mars," the Kid Patrol uncovers a mysterious brass key and a cryptic letter from the reclusive Silas Scoff, leading them to a hidden vault beneath his estate. There, they confront a Martian machine-man who reveals he’s been building an oxygen vacuum to save his dying planet—only to be thwarted by Teddy’s clever ruse of replacing his oil with water, causing his gears to rust.

Jo, a baseball player, rushes to Cyclone Cupid for help after his teammate No. 13 struggles to keep up during a track meet. Cyclone Cupid, unimpressed by the request, simply hands him a standard arrow with a sharp point, leaving Jo both puzzled and hopeful.

In the Pacific theater of World War II, a wounded soldier claiming to be ace pilot Phil Bronson is rescued and brought to Intelligence HQ in Honolulu, where he helps identify fellow POWs missing after the Battle of Tugi. As Captain Don Leash investigates a string of failed missions and suspected traitors, he grows suspicious of Bronson’s sudden recall and begins to uncover a web of deception that leads him into a deadly chase through the shadows of wartime espionage.