Teenagers from a small town and their high school science teacher join forces to battle a giant mutant spider, living in a cave nearby and getting hungry.
When Pa wins a jingle-writing contest, he and Ma head for New York City. They they get in trouble with gangsters when they lose some stolen money which they had already agreed to deliver to one of the thugs.
Two couples are on a boating trip when they come across an uncharted island. The four investigate and find themselves in the clutches of Dr. Albert Balleau, whose hobby is hunting both animals and humans… The group tries to escape only to be thwarted by Dr. Balleau and his henchmen.
World War II veteran Bob MacDonald surprises his new wife, Betty, by quitting his city job and moving them to a dilapidated farm in the country. While Betty gamely struggles with managing the crumbling house and holding off nosy neighbors and a recalcitrant pig, Bob makes plans for crops and livestock. The couple's bliss is shaken by a visit from a beautiful farm owner, who seems to want more from Bob than just managing her property.
Bat Masterson's old friend Billy Burns convinces him to become marshal of Liberal, Kansas and help the residents fight drought and a destructive range war.