A con artist attends a reunion in his hometown and discovers that his former classmates are trying to trick an old millionaire into returning to build a factory.

Dr. Paul Carruthers is frustrated because he thinks his employers, Mary Heath and Henry Morton, have cheated him out of the company's profits. He decides to get revenge by altering bats to grow twice their normal size and training them to attack when they smell a perfume of his own making. He mixes the perfume into a lotion, which he offers as a gift to Mary and Henry. When they turn up dead, a newspaper reporter decides to investigate.

Millionaire Larry Duane is posing as his own chauffeur while touring the West and meets Molly Hennessey. They have a small romance until it is ended when her father strikes oil and moves his family east to satistify his wife's social aspirations. Larry also return east to close his estate for the summer, but stays on, still posing as the chauffeur, when he learns that Molly's family is renting the place.

A group of delinquents on their way to summer camp get stuck in a haunted house.

An outlaw on the run assumes the identity of a dead man. When in his new identity he finds himself elected the mayor of a small town, he decides to go straight.

High-school principal Dr. Alfred Carroll relates to an audience of parents that marijuana can have devastating effects on teens: a drug supplier entices several restless teens, Mary and Jimmy Lane, sister and brother, and Bill, Mary's boyfriend, into frequenting a reefer house. Gradually, Bill and Jimmy are drawn into smoking dope, which affects their family lives.

Life in mid-century America is humorously compared to life at the turn of the century. Subject covered are keeping accurate time, proposing marriage, waking up in the morning, and going to the movies.

An undercover Texas Ranger runs into trouble when he learns that the murderer he's trailing has a twin brother.

A seemingly charitable soup kitchen operator (who moonlights as a criminology professor) uses his Bowery mission as a front for his criminal gang. Police attempt to close in on the gang as they commit a series of robberies, murders and bizarre experiments on corpses.

Truck drivers Steve Hackett and Bill Purvis are fired from their jobs with the West Coast Trucking company for not using second-gear going down steep grades. Davis, the company vice-president, surprisingly asks them to carry a load of merchandise to Arrowhead and offers a $1000 bonus. He tells them it is a load of lettuce. Several miles out of Los Angelese, they are stopped by a mob of lettuce-farm workers on strike. When the first crate is tossed off the truck, it explodes and the two pals learn their merchandise is a cargo of dynamite. The workers let them proceed and they crash into a car driven by Mary Stevens, whom they had met at a restaurant. She and her dog, "Butch" (played by a Credited dog named Stooge), join them and they deliver their cargo, and learn unscrupulous real-estate operators have jammed the locks on the dam in order to ruin the ranchers and farmers and take over their property.