Texas Ranger O'Brien has an outlaw twin brother. When his sibling is killed, O'Brien assumes his identity in order to infiltrate a gang of stagecoach robbers.
Despite his unprepossessing screen personality, singing cowboy Jimmy Wakely was starred in a series of Monogram westerns, one of which was West of the Alamo. Wakely and comedy sidekick Lee "Lasses" White play a pair of government agents who work undercover to solve a series of baffling crimes. It comes to no one's surprise that the criminal mastermind is the town's leading citizen, in this case banker Clay Bradford (Jack Ingram). As was typical in the Wakely westerns, West of the Alamo is approximately 25 percent action and 75 percent musical. Among the guest warblers this time out is the Arthur Smith Trio, headed by a gospel singer who'd later emcee a popular religious TV talk show.
In this western, William Farnum plays yet another Zane Grey character. Duane Steele (Farnum) is a Texas Ranger who is determined to get the outlaws out of his part of the Lone Star state for good.
The town of Rio Blanco is the center of a fight over the statehood issue and is a perfect setup for Lon Bryson and Chuck Bowers, who organize a couple of phony protection associations. Opposing them is Henry Waterman, publisher of the Rio Blanco Herald. He and his assistant, Andrew Jackson Weems, send for the help of the Territorial Rangers. One of the dispatched Rangers is Jeff Lanning who, unknown to him, has a brother as a member of the gang under an assumed name of Bob Mitchell. Jeff is so shocked at seeing his brother gun down Waterman that he is unable to act in time to prevent it. Unable to explain the cause of is inaction, he is suspended by the governor. Unable to persuade his brother to quit the gang, Jeff, with the aid of Weems and Waterman's daughter Carol, begins his quest to bring the outlaws to justice.
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.
Cal Stanley goes undercover as a beef buyer in order to catch the gang responsible for stealing the area's cattle.
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.
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.
Peggy Barlou is a young rancher who refuses to sell her spread to greedy stage-line proprietor John Rankin. Tex Haines, meanwhile, is accused of killing Bill Dugan, Rankin's bodyguard, but eludes capture long enough to hook up with Dave Wyatt and Panhandle Perkins, a couple of rangers in disguise.
An outlaw named Duane ( Tom Mix ), captured by the Texas Rangers, is promised a pardon if he rounds up a gang of cattle thieves. The man he suspects as the leader is revealed to be the father of Duane's sweetheart, Helen ( Billie Dove ). Duane captures the gang, gets a pardon for Helen's father, and marries Helen.
When Tim Barrett rides into Carabinas, his reputation as a lawman precedes him. Rescuing Polly Loomis from the unwanted attentions of a saloon ruffian, he learns her mother married ranch foreman Nick Grindel shortly before her death, and left everything to him in her will. Nick has proposed marriage to his stepdaughter, and she fears violence if her hot-blooded brother Dick finds out. When a body is found at the Bow Knot, Tim barely rescues Dick from a necktie party and is deputized to investigate when Dick confesses to a crime he didn't commit.
The Buck Jones western The Fighting Ranger utilizes its familiar plotline with excellent results. When Jones' kid brother is killed by the villains, our hero quits the Texas Rangers and sets off to seek vengeance on his own. He ends up just below the Mexican border, where bandit leader Cougar (Bradley Page) lives high off the hog, knowing he can't be extradited.
An undercover Texas Ranger runs into trouble when he learns that the murderer he's trailing has a twin brother.
Tex Wyatt is blamed for a murder actually committed by Ransom and Holman, a couple of thieves. Tex manages to escape and is reunited with his two ranger pals Jim Steele and Panhandle Perkins, both of whom are working undercover as performers in a medicine show.
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.
To prevent a lynching, Ranger Tim lets two outlaws go saying he will get them later. This gets him kicked out of the Rangers and he goes across the border and joins Big George's gang who are running contraband. But the outlaw Jimmy overhears Tim tell his sister that the dismissal was a fake. Big George and his gang then go after Tim and trap him in a cabin.
Singing cowboy Tex Ritter and his sidekick, Slim Andrews, star in this musical Western about a couple of Texas Rangers who defend the citizens of a small territory from power-hungry outlaws. Villain Bradley Craven (Forrest Taylor) is determined to stop the election process that would allow the region to join the Union. Tex and Slim join a rancher and his daughter to stop Craven, with fearless Tex going undercover to ensure that justice is served.
Capt. James Stewart pursues the bandit "The Kinkajou" over the Mexican border and falls in love with Rita. He suspects, that her brother is the bandit.
The Texas Rangers send Dave and Chito into the badlands to see if they can locate a counterfeiting operation. They arrive posing as wanted outlaws and this gets them into the gang. But as soon as they uncover the operation and locate the printing press, one of Chito's girl friends arrives to expose their identity and they find themselves trapped by the entire gang.
The Texas Rangers take on a shyster who is trying to bilk a family of their money after he learns that an oil company thinks their land may contain the black gold.