The newspaper editor of Wilcox asks the Rangers for help, and two of them are dispatched to the town. However, when they get there they find the editor has been lynched and is hanging from a tree.

A gang of desperadoes cuts a swath of murder and robbery across the whole Arizona Territory, laughing at the Rangers attempts to bring them to heel. Since the gang uses every trick in the book to cover their tracks, Rynning hires an Apache tracker to find the outlaws.

A member of the notorious Wild Bunch bandit gang escapes from Ranger Clint Travis' custody, resulting in his being fired. Furious, Travis sets out to take on the whole gang and salvage his career and reputation.

Clint Travis goes undercover as a gun smuggler to stop Mexican revolutionary Juan Morales' plans to topple the Mexican government.

The Rangers set out to stop a smuggling ring that's bringing Chinese immigrants across the Colorado River.

A gang of convicts has escaped from prison, but Capt. Rynning's can't get any more men to help capture them.

When Clint Travis is falsely accused of Murder. Rynning sends him into Galioro Mountains to prove his innocence by finding the cattle rustlers who actually committed the crime.

Travis goes after escaped con Cain Devers, a bank robber and counterfeiter who is using his counterfeit plates as part of a plot to destroy his father and younger brother.

A Ranger suddenly resigns without explanation. Rynning tries to discover what's behind it and finds that the man is hiding a secret that he won't take a chance on anyone finding out about.

The wife of a preacher who recently established a mission for Apaches living near Galeyville receives a suspicious telegram and fears her husband has been murdered. Travis learns that a lynch mob hung two Indians accused of being horse thieves and the minister who tried to prevent the hanging. He also discovers that, in a moment of cowardice, the town sheriff failed to prevent the hangings.

Travis poses as an outlaw in what seems to be a very peaceful valley to try to find the reason behind the disappearance of a U.S. Marshal.

An Apache inherits a small ranch and his white neighbors don't care for the idea of having an Indian for a neighbor.

Rynning and Travis investigate when a number of women are murdered in a small Arizona town. Since the circumstances surrounding each murder are identical, the rangers fear that they are trying to capture a psychopathic misogynist. When Travis finds a footprint with a distinctive heel mark near the body, the lawmen search the surrounding area for the owner of such a boot.

In order to prevent the hanging of their gang members a family of outlaws kidnaps the daughter of the commander of an army post instructing him to release his prisoner or the young woman will meet the same fate. When the army carries out the execution anyway, Rynning, Travis and two undercover Army officers must free the girl before word of the gang members death leaks out.

Ranger Joe Pierce captures a pair of outlaws and turns them over to a sheriff for safe keeping. Sheriff Brennan recognizes that one of the outlaws is a dead ringer for the son of a wealthy rancher who went missing in action while serving in the military and uses the chance for to earn some quick cash so he can woo a pretty saloon girl.

Unemployed miners threaten to burn down the Bisbee bank unless they can withdraw money from their accounts. Unfortunately, the local office doesn't have enough money to meet their demands, so they must pull cash from other locations to survive. Travis is ordered to guard the shipment and must deal with corrupt businessmen and crooks with itchy trigger fingers to get the money through on time.

The careless activities of a former Ranger (Walter Kelly) have Mexico and Arizona on the brink of war.

The Rangers try to capture a ruthless cattle baron and his gang.

An Arizona Ranger is shot in the arm while attempting to thwart a hold-up. He convinces the doctor not to inform Captain Rynning of the seriousness of his injury until he can at least try to regain his shooting form. His fiancée fears that he will be no match for the outlaws who are hijacking gold shipments near his station.

While trying to enforce the embargo placed on Mexican cattle, an Arizona ranger is shot and left for dead by a trio of cowboys. One of the cowmen takes pity on the wounded lawman and takes him to a nearby ranch for medical assistance. Rynning is determined to bring the shooter to justice and break up the cross-border cattle trade to an end.

After a shipment of gold guarded by the Arizona Rangers is stolen, the U.S. Marshals assigned to the region accuse Ranger Ben Thorpe of complicity in the theft.

Rynning and Travis assist the Mexican Rurales hunt down the remnants of an army of bandits who sought to overthrow the government. During the chase, one of the outlaws is killed by the border patrol and incorrectly identified as the movement's commander, Romero. Meanwhile, the erstwhile leader assumes the identity of a poor peon and goes in search of the loot from a train robbery hidden nearly ten years earlier.

Kevin Hardy, a rancher who is about to be released from prison gets a visit from his crippled brother, Arron, who goads him into taking revenge against the former sheriff who arrested him for manslaughter. Meanwhile Arron has hired an outlaw to kill his brother and frame the ex-lawman for the crime.

Clint Travis works his way into the heart of a gang of bank robbers.

During an election campaign for the office of Sheriff of Globe, Arizona, a crooked drifter plots to embarrass the incumbent by bringing in an "escaped" prisoner he took from Ranger Clint Travis' custody the day before the election. To make his election more likely, his gang robs the town's express office and shooting the Sheriff's leading advocate while Harding is out of town helping the Rangers locate their escaped prisoner.