Tex is up against a group of hooded outlaws. When he shoots one, he uses the hood to infiltrate the gang. Almost caught by them, he escapes only to be arrested by the Sheriff who thinks he's one of the gang.
Tom "Killer" Dane kills Jeff's friend, who then pursues him. Jeff and Dane are look-alike half brothers, which allows Dane to make a raid dressed like Jeff. Jeff is arrested, but before Dane's henchman can organize a lynch mob, Fuzzy breaks him out and Jeff heads after Dane again.
Cowboy Larry O'Day and his sidekick Lucky Smith happen upon a distraught Barbara Hartwell, who is about to be arrested for the murder of her uncle. With Barbara behind bars, Larry is determined to find the real killer and soon finds himself in the middle of a mystery involving crazed German entomologists and a smuggling ring bringing Chinese "picture girls" across the Mexican border for sale to wealthy Chinese bachelors.
Ex-Army officer Jameson takes a job a prison guard at San Quentin. Joe, the brother of his new girlfriend May, is sentenced to the prison for robbery. When Jameson tries to separate lawbreakers from hardened criminals, badguy Hansen tries to stir up trouble by telling Joe about Jameson's interest in his sister.
A crooked real estate manipulator sells worthless land on mortgage to flood refugees, then tries to profit by reselling the land to the state, committing murder in the process, as the Three Mesquiteers work to bring him and his gang to justice.
Millioniare Curran, thinking his son too intellectual, sends him west to learn logging at one of his lumber camps. Unknown to his father, Grant Curan is a professional wrestler and easily able to handle the thugs that attack him at the lumber camp. This enables him to stay on the job and he soon undercovers how his father is being cheated by the local boss.
A federal agent and a female reporter team up to catch a criminal gang that has kidnapped a scientist in order to get his formula for a new type of poison gas.
New York City cop Phil Donlon leaves the force to join the U.S. Olympic team. When he falls for a Marine colonel's daughter he gets kicked off the team. Joining the Marines to win the Colonel's approval many adventures follow.
American racketeer Jimmie Dean travels to England, where he assumes the identity of a Canadian whom he has been falsely accused of murdering. Jimmie is then forced to join the British army in the dead man's place. He falls in love with the Canadian's childhood playmate, Sally Briggs, and becomes a hero after saving an isolated English colony in China.
As the sheriff of a small western town, Autry sings his way into a relationship with Eleanor, a singer from a Chicago nightclub who earlier witnessed a murder.
A singer in Shanghai looks exactly like a missing flyer who went missing, and is feared to have sold the experimental airplane that he was flying. Foreign gangsters, the missing flyers girlfriend, and the U.S. military wants him, dead or alive.
The Commandant is making life rough for the colonials in Spanish California. While trying to help, Zorro is charged with the murder of the new Governor, but in the end he triumphs over the evil Commandant.
Aircraft are being shot down by a large black plane with a big "X" painted on the wing. The chief suspects are invited for the weekend to an old dark mansion.
Christopher Powell is in Malaysia with his fiancée and her father, capturing wild animals. While out hunting, he is attacked by a tiger, and his native guides run away, leaving him for dead. But the tiger is the pet of Ulah, a beautiful young woman who grew up by herself in the jungle. She rescues Chris and takes him back to her cave, where she nurses him to health and falls in love with him. When he eventually returns to camp, she follows. The fiancée is jealous, and the natives don't like Ulah or her pet tiger either, all of which leads to a lot of trouble.
In his film debut Ritter is sent to investigate miners being killed and their mines confiscated. The culprit is Evans and after Tex joins the gang, he is sent to kill two more miners. When Estaban is killed, Tex is put on trial for all three murders.