A none-too-popular (nor good) radio singer, Rita Wilson is murdered while singing on the air in a radio studio. Radio page boy, Frankie Ryan, and his janitor pal, Jeff, solve the mystery for the none-too-sharp police.

Porky hosts a radio program, where animals tell their stories. The guest star is Kansas City Kitty, the best mouser in the country. She tells the story of her life, including her marriage to Tom Collins, the birth of Little Patrick (not necessarily in that order), and the turning point of her life. The mice have plotted out a major operation like gangsters. They sneak out and kidnap Patrick and hold him hostage...

Larry Baker is a young fireman whose daring exploits have led him to receiving a lot of newspaper publicity which goes to his head. His sweetheart, Mary O'Connor, and fire-department friends begin to shun him as they think he is just a publicity hound. But a daring rescue of Mary and her younger brother, Mickey, from a blazing inferno shows him to be more than just a publicity-chaser and, now, a real hero to all.

It takes the form of a travelogue aboard a train that hits some California spots, including Death Valley and Pike's Peak.

Mr. Dithers invites the Bumsteads on a South American cruise. Somehow Dagwood winds up as the female drummer in the ship's band, while Penny Singleton gets to show off her Broadway background in some lively musical numbers.