Shadrach Jones, ex-Texas State Policeman, has the ruthless determination to find and kill the man who shot his brother in the back and stole the money with which he was to buy a ranch for the two of them. At the saloon-hotel run by Adelaide, Shadrach is convinced that one of the cowhands on the Captain McKellar cattle drive to Montana is his man. He takes the job of trail-herd boss to find the killer. McKellar preaches to Jones that he should forget revenge and let the law of retribution take care of the killer. Shadrach's hard driving of the men and his hunt for the killer makes him bitterly hated, and his retribution quest ends in a manner he did not anticipated.
Tubercular Frank James has become a born again and retired from his career as an outlaw with his family but a look-a-like outlaw causes suspicion to fall back on him.
Going undercover as the notorious "Waco Kid," U.S. Army Captain Jeff Packard manages to infiltrate a gang of gold-shipment thieves lead by nasty Walt Anderson. But Anderson and his gang are not the only troublemakers around: Packard must also contend with Geronimo and his Apache warriors, who are demanding guns in exchange for peace.
Cattle detective, Rocky Lane, arrives in town to investigate cattle disappearances only to realize just three cows owned by eccentric inventor, Nugget Clark, are involved. However, the disappearances lead to a deeper mystery involving dynamite explosions, rampaging cowboys and a water shortage.
A group of ranchers, led by Colonel Arnold and Ward Gordon, are drilling an oil well but getting fierce opposition from an unknown gang of outlaws. Eastern promoter J.B."Dude" Dawson, is behind the gang as he is out to prevent the co-op members from striking oil before their lease expires, so he can secure the property for his company. When Ward, with the help of Arnold and his daughter Sally, arranges for a new driller to be brought in, the replacement man is killed and one of Dawson's men takes his place.
Gene Autry becomes the new Sheriff after bank robbers kill the former sheriff. When Judge Beaumont is murdered, evidence points to the judge's wild son. Believing the young man, Gene tries to help.
Indian scout Tom Jeffords is sent out to stem the war between the American settlers and Apaches in the late 1870s Arizona. He learns that the Indians kill only to protect themselves, or out of retaliation for white atrocities.
Monte Hale is cast as town marshal Barney Regan. It is Barney's formidable task to round up a gang of bank robbers and expose the "Mr. Big" behind all the robberies.
An American actor, impersonating an English butler, is hired by a rich woman from New Mexico to refine her husband and headstrong daughter. The complications increase when the town believes the actor/butler to be an earl and President Roosevelt decides to pay a visit.
The third installment in low-budget producer Lindsley Parson's "Chinook" series, Snow Dog was ostensibly based on pulp writer James Oliver Curwood's 1915 short-story "The Tentacles of the North," which was also the working title. Kirby Grant again played Rod McDonald of the Canadian Royal Mounted, and once again the vehicle was stolen by his canine sidekick, the white malamute Chinook. This time, Rod and Chinook are tracking a mysterious white wolf, thought to have killed several of the local traders.
Lin McAdam rides into town on the trail of Dutch Henry Brown, only to find himself in a shooting competition against him. McAdam wins the prize, a one-in-a-thousand Winchester rifle, but Dutch steals it and leaves town. McAdam follows, intent on settling his old quarrel, while the rifle keeps changing hands and touching a number of lives.
Prospector Jeff Malloy rescues Doris Devlin, owner of a trading post, from an ambush planned by her uncle, Kilburn, who is trying to scare her out of the territory so that he can continue his counterfeiting operations.
As a boy, Shamrock's parents were killed. He took possession of a pistol belonging to his father, a famous marshal. Now that he is grown, he takes the job of marshal and uses the same gun, but he still has to solve the mystery of what happened to his parents.