Cal Stanley goes undercover as a beef buyer in order to catch the gang responsible for stealing the area's cattle.

Texas Ranger Jake Cutter arrests gambler Paul Regret, but soon finds himself teamed with his prisoner in an undercover effort to defeat a band of renegade arms merchants and thieves known as Comancheros.

Having fled to Mexico from the U.S. many years ago for killing his father's murderer, Martin Brady travels to Texas to broker an arms deal for his Mexican boss, strongman Governor Cipriano Castro. Brady breaks a leg and while recuperating in Texas the gun shipment is stolen. Complicating matters further the wife of local army major Colton has designs on him, and the local Texas Ranger captain makes him a generous offer to come back to the states and join his outfit. After killing a man in self-defense, Brady slips back over the border and confronts Castro who is not only unhappy that Brady has lost his gun shipment but is about to join forces with Colton to battle the local raiding Apache Indians.

Texas Ranger Buck Dunne is assigned to round up a gang of bank robbers. The leader of the gang turns out to be the "respectable" Judge Longstreth, making life difficult for Dunne inasmuch as he's in love with Longstreth's niece Barbara.

Ten years after the Civil War has ended, the Governor of Texas asks Leander McNelly to form a company of Rangers to help uphold the law along the Mexican border. With a few veterans of the war, most of the recruits are young men who have little or no experience with guns or policing crime.

Someone has been stealing ore from a valuable smelting mine. One of the independent mine-owners victimized by the crooks is pretty Joan Manning, making the Rangers' mission a bit more pleasant.

In this western, fake settlers make themselves at home on an ex-ranger's ranch and drive him away. A shady newspaper publisher and a gambler then conspire to take over the land. Fortunately, another ranger endeavors to help his pal. Enlisting the aide of his fellow rangers, they get oust the homesteaders. The publisher and the gambler shoot each other and the retired ranger gets his ranch back.

The Texas Rangers round up rustlers by masquerading as the same. Trouble ensues when while in disguise one of the Rangers is accused of a killing.

Walter Brennan is back as the clever and funny over the hill Texas Ranger Nash Crawford. This time the gang must face corruption in their own home town. The gang put their heads together to clean up their town, take back the rule of law and rehabilitate the town lush (played by Fred Astaire) along with way.

Pete Marlan is a gambler with an unsavory past. Suspected of being an outlaw, Pete plays along with this misconception, the better to infiltrate a gang of smugglers. Along the way, he clears the name of the brother of Texas Ranger Mike Donovan, and helps patch up the romance between Donovan and heroine Bernice.

Texas Ranger Dusty Rivers ("Isn't that a contradiction in terms?", another character asks him) travels to Canada in the 1880s in search of Jacques Corbeau, who is wanted for murder. He wanders into the midst of the Riel Rebellion, in which Métis (people of French and Native heritage) and Natives want a separate nation. Dusty falls for nurse April Logan, who is also loved by Mountie Jim Brett. April's brother is involved with Courbeau's daughter Louvette, which leads to trouble during the battles between the rebels and the Mounties. Through it all Dusty is determined to bring Corbeau back to Texas (and April, too, if he can manage it.)

A Texas Ranger must capture an outlaw and take him-in, while tangling with savage Apaches and greedy bounty-hunters on the way back to jail.