Two strangers, a man and a woman, are framed for a jewel robbery and thrown in jail. After they get out, they join forces to track down the real thieves.

Cattle are being routinely stolen from a local ranch, and suspicion centers on a local mountain family. But the Three Mesquiteers are wise to the criminals' deeds. But when a ranger is shot and Stony is framed for the crime, it's up to Lullaby and Tucson to prove his innocence.

An internationally-notorious criminal scientist returns to the US to sell his latest invention, a disintegrating gas, to a foreign power. When he arrives, however, he is spotted by a young Coast Guard man, whom he kills - and thus earns the enmity of the entire US Coast Guard, but especially the murdered Guardsman's older brother who, together with his reporter-girlfriend and her comical photographer, vigorously sets to tracking him down and interfering with his plans to develop the city-melting gas in quantity. A Republic Serial in 12 Chapters.

William Reardon, a steel magnate, dies and leaves a strange will. When his spineless and dandified heir and son returns home from living in Paris, he finds "Tons' Walker, a strong and burly steel worker running the company, per his late-father's will request. He also finds that his father's will specifies the Junior will change his name to Bill Hall and work in the family steel mill for a year under the fake name. Walker's job is to make a man out of the son. The son is not overjoyed by this prospect. Neither is Walker.