Jack Armstrong #7

Jack Armstrong teams up with his friend Jim Fairfield to solve a mystery when a secret electronic device, the Intro-Ray Set, goes missing just before a high-stakes baseball game. With professional gamblers suspected of trying to fix the game, Jack uses clever thinking and a simple trick involving rubber shower caps to protect his teammates and uncover the thief.

Frank O'Bannon and his brother Robert face a dangerous swim in the Blue River when Robert suffers cramps and begins to drown. Using his first-aid training, Frank stays calm and works to rescue his brother, keeping him afloat until help arrives.

In "The Counterfeiters," Jack Armstrong teams up with scientist Vic Hardy to uncover a local gang of forgers, turning a lesson in currency forensics into a real-world chase. With sharp eyes and quick thinking, the duo races to outwit criminals before the counterfeit money spreads further.

Billy Fairfield tries to impress the crowd at the amateur show with a magic act that goes hilariously awry, using chickens and eggs in unexpected ways—only to find his chaotic performance wins first prize. Meanwhile, his rival Egbert Sneery watches from the sidelines, unimpressed by Billy’s antics.

In "Lion on the Loose," Betty teams up with her friend Molly Madden, the circus’s star trapeze artist, when a lion breaks free and sends the big top into chaos. With quick thinking and a daring plan, Betty steps in to help calm the situation—just as the spotlight turns on her.