The host of a whodunit radio show finds himself involved in his own mystery when he awakens to find a woman with a knife in her back in his bedroom.

A cowboy and his sidekick track mail thieves to a hide-out.

After her brother is wrongfully arrested for the theft of some bonds, a nurse sets out to clear his name by becoming the home-care nurse for the ailing leader of the gang which actually stole the bonds.

A masked desperado wants to disrupt the mail service between two frontier communities.

As foreman of a dude ranch, Gene has two problems. One is a guest, the spoiled daughter of a millioniare, and the other is the disgruntled ex-foreman that Gene replaced, now just a ranch hand. Gene eventually gets the daughter straightened out but has to fire the ex-foreman and this leads to trouble when he returns intent on revenge.

Steve Kinney and his henchman, Mort, are trying to stir up trouble between the local ranchers and farmers, behind a wave of rustling and lawlessness. Mort kills Vic, a Kirby cowhand, and lays the blame on Dan Harper, the leader of the farmers faction. Storekeeper Fuzzy Q. Jones, fearful of losing the outstanding charge-accounts he has on his books, drags his reluctant pal, Billy Carson, into the fray, and the two soon prove Kinney and his henchmen to be behind the valley's troubles.

Dry Gulch Trading Post owner Kurt Fabian advances money on mortgages to the local settlers to finance an irrigation program. Rangers Tex Wyatt, Jim Steele and Panhandle Perkins transport the money in a strong box which they place in the Wells Fargo safe as Agent Sam Benson assures them that he is the only one who knows the safe combination.

Jim is hardly thrilled when his new bride, Ellen, invites an old friend, Randy, over for dinner. Yet Jim turns genuinely dismayed once Randy arrives and turns out to be an insufferable, boorish braggart with bad manners and little self-awareness. That dismay turns to outright annoyance when Jim realizes Randy thinks he has come to stay for the weekend. How much damage to a marriage can one unwanted guest do in the space of one weekend?