California cowpuncher Jim Kern and his pal enlist in the war against Germany and, shortly thereafter, meet Frank Akuri, who has pledged to colonize the United States for his homeland, Japan. While Jim and other white males are fighting in France, Akuri forces Jim's sweetheart Mary to sell her ranch, as she is not able to run it because the only men left, the Japanese, have pledged not to work for the whites. With the ranch, Akuri begins his colony. Mary counters by organizing her society women friends to appeal to Congress against the "yellow menace." When it seems that his plans will be thwarted, Akuri issues orders for the death of Mary and her friends, but Jim and his pal return and rescue them. Akuri then kidnaps Mary and takes her to his apartment, but with the help of Akuri's wronged Japanese lover, Jim learns her whereabouts. He organizes a posse of American Legion locals and rescues Mary just as Akuri is about to murder her. Akuri's group is routed out.

Red attempts to save the townspeople whose water supply is held hostage by a villain.

Tom Grant has found a rich gold vein and Bart Eaton is after it. Tom's sister Mary heads for the gold fields and Eaton and his men follow. Eaton teams up with Ace Daggett who plans to doublecross him and get the gold for himself. They frame Tom for murder and then try to get him to sign over his claim. The famous scout Tex Houston is on hand, escaping the attempts on his life, saving Mary from various perils, and trying to bring in the real killer and clear Tom.

Outlawed Guns stars Buck Jones as Reece Rivers, the nice-guy older brother of headstrong Babe Rivers. When Babe gets mixed up with outlaws, Reece loyally takes the rap. Eventually Babe pays for his recklessness with his life, but not before leading Reece to the film's head bad guy, gambler Jack Keeler.

Cowboys live amidst Hawaiian scenery and song.

A hero goes undercover to uncover outlaws while singing to a heroine and being sneered at by a bad guy.

Hoppy's friend Dennis owns a rich gold mine. Frazier who owns the adjoining mine and wants the Dennis mine, has Dennis killed. Hoppy steps in to take over running the Dennis mine and learns Frazier's men sneak into and work the Dennis mine at night. Hoppy captures one of Frazier's men only to be captured in return by Frazier and left to die in a burning building.

A young mining engineer sets out to catch the killers of both his brother and a beautiful young girl's father.

Stephen Westcott and Ed Martin scheme to put Jane Travers' wagon line out of business. They want to use it take over all the wagon- train traffic going west. Hoppy, California and Lucky must make sure that doesn't happen.

A 12-episode serial in which Tailspin Tommy evades volcanoes, anti-aircraft shells, and time bombs as he foils a plan by corrupt profiteers to steal an island's oil reserves.