Roy is put in charge of a highway construction project. A rancher tries to stop Roy from putting a highway across his land because he fears that the authorities are going to discover the unscrupulous manner in which he got it.

An experimental weather satellite and a missile base are at stake when Roy discovers foreign agents around his ranch.

An Indian agent comes to the rescue when a local tribe's fishing rights are threatened by a greedy cannery owner.

Roy puts a stop to gun smuggling.

Evil Grant Withers lets a killer horse loose to ruin valuable horses on nearby ranches. He hopes to shake down the ranchers for his "protection". Roy tracks down the bad guys, but is suddenly trapped by them. Peter Miles, a boy terrified of horses, overcomes his fear and rides for help to save the day.

Diamonds are being smuggled across the border from Mexico in a specially made shoe of a palomino mare. One of the smugglers is killed when the mare runs off. The sheriff blames Trigger for the death. To keep his horse from being destroyed, Roy confesses and goes to jail. The smugglers buy Trigger and put him to work smuggling diamonds. The mare, who had earlier heard a trist with Trigger, foals Trigger, Jr. who Roy, finally out of jail, uses to help capture the smugglers.

The bad guys dynamite a fish hatchery. They're trying to put the hatchery out of business so they can get possession of oil underneath the lake. Roy is a game warden investigating the dynamiting.

Sintown is just a deserted ghost town until Vanerpool starts looking for silver. Cookie and Roy's partners put $20,000 into the business only to find that the mine is worthless and Vanerpool is bankrupt. Carol comes out to look for silver to save the company, but does not know that their engineer, named Regan, is crooked and wants all the silver for himself. But only Old Ed knows where the mother lode is located.

Monte Hale is a stagecoach driver for Jed Baker's stage-line. Jed believes his brother, Ralph, is behind the many hold-ups of his stagecoaches but has no proof. Ralph, in turn, blames Jed for the attacks on the linemen of his pioneer telegraph company. Big Bart, a ruthless gunman and outlaw-gang leader working for crooked banker Jordan Weatherbee, is actually behind the troubles of both companies. Bart plans to frame Jed for a double-murder and then kill him. Monte saves his life and, together, they devise a plan of their own to bring an end to the reign of lawlessness along the timber trail.

Monte Hale has been working as a teller in a Texas bank during the summer to earn money for his medical college expenses during the upcoming year. He is about to leave to return to college when the bank is held up by two members of a notorious gang, headed by Marlowe, leaving Monte with the smoking gun of one of the bandits that killed the bank president. To avoid bringing disgrace on the family of his sweetheart, Julia Collins, by revealing that it was her brother Jeff, supposedly working in Denver, who induced him to open the back door of the bank to let the robbers in, Monte allows suspicion to rest on him until he can clear himself.

The period is the 1840's and Greg Thurston is out to establish his own empire out of a large area of the west. He needs rifles to give to the Indians but Monte Hale breaks up his attack on the supply train. But when they get them by robbing the warehouse, Monte suspects Thuston who had the other key. He follows Thurston only to be caught by him just as Thurston launches his final big attack.

Singing cowboy Monte Hale plays "himself" in the Republic western Last Frontier Uprising. Actually, he's not really himself, but a federal agent, dispatched to Texas to buy horses on behalf of the government. Hale runs up against a vicious gang of horse thieves, including such veteran western hard cases as Roy Barcroft and Philip van Zandt. The romantic interest is in the dainty hands of Adrian Booth, who used to go by the name of Lorna Gray. Put together with the standard Republic efficiency, The Last Frontier Uprising benefits from the breathless direction of Lesley Selander.

Newcomer Monte Hale is tying to just get a job in western films when he meet young Danny McCoy and his sister Gloria. Danny is trying to get his horse, "Pardner" into films. Monte sings a song and "Pardner" does some tricks and a casting director notices. Monte gets a singing-cowboy role and the horse gets a bit, but there is an accidental explosion, engineered by western star Rod Mason, who is jealous of Monte, and the horse is badly scared and blows his lines.

The "star" in the title of this low-budget singing Western was Dynamite, a wild stallion captured by cowboy Curt Walker to ride in the Big Rodeo. Unscrupulous John Burton has bet against Curt and does his best to sabotage the event. When lovely Barbara Allen, Curt's new girlfriend, leaves town because of Burton's schemes, Curt loses the first couple of events. The big Bronco Busting contest is coming up, and Pop Walker stalls the proceedings with a series of singing acts while the girl's brothers attempt to locate her. Barbara arrives just in time to spur Curt on to victory.

Doris Rogers, half owner of a dude ranch, as Jimmy Wakely, "Lasses" White and Dusty Smith to help run it. U.S. Marshal Tom Logan, posing as a stage driver, is killed during a mock holdup of new arrivals to the ranch. Brenda Amers and Horatio Pennypacker, eastern jewel thieves, bring their loot to Roy Williams, who owns the other half of the ranch as a blind for his gang which resells stolen jewels. Vaughn, the desk clerk, re-cuts the jewels in a secret room in the ice house. Fearing he will be caught, Brenda refuses Williams her stolen diamonds and hides them in a bar of soap.

In this musical western, a cowboy band is offered the chance to appear in a Hollywood movie and begins the journey to the West Coast. Unfortunately, the band ends up stranded in Texas and must take a job running a ranch. Musical mayhem ensues: Songs include: "Let's Love Again," "Where the Prairie Meets the Sky," "Don't You Ever Be a Cowboy," "Texas Polka," "No Letter Today," "I Got Mellow in the Yellow of the Moon," "Sip Nip Song," "Salt-Water Cowboy," "The Blues," "Little Brown Jug" and "And Then."

A rancher who becomes a pilot staunchly defends the newly formed Civil Air Patrol from the cattle barons who fail to see the value of airplanes on the range.