The Adventures of Rex the Wonder Dog #27

In the 1956 adventure "Mystery of the Midget Sub!", Rex the Wonder Dog joins Major Dennis and Danny on a sea voyage that takes a dramatic turn when an atom bomb test sends shockwaves through the water. When Major Dennis vanishes after diving to investigate, Rex and Danny plunge in to search—only to face a shark, a manta ray, and a hidden midget submarine near a sunken ship rumored to hold a fortune in pearls.

In "A Whistle for Bobo!", the ever-enthusiastic canine detective finds himself put in charge of traffic duty after his constant cereal-box whistling drives the Sheriff to distraction. When Bobo accidentally halts a city block with his chatter, he spots a stolen cache in a fleeing getaway car and springs into action—riding his bike, hiding in the brush, and using nothing but his whistle to mimic a full police force. The ruse works perfectly, leading the Sheriff straight to the crooks. Bobo’s reward? A whole new set of whistles—because apparently, the noise is the real law enforcement.

In "Track of the Phantom Cat!", Rex the Wonder Dog goes on a wild chase across the Western frontier during a bus tour, tracking a panther that startled a herd of cattle. When the big cat becomes a reluctant ally—helping calm the stampeding herd and even licking Rex in gratitude—Danny and Rex uncover a surprising twist: the panther was once a lost pet, raised from a kitten by a kind owner. The adventure ends with Rex earning a reward that’s as unexpected as it is heartwarming—a tiny panther kitten of his very own.