The lawmen are troubled when an aging gunfighter comes to Bordertown, followed by glory-seekers who are out to kill him, and a novelist, who wants to write a story about him.

A young easterner challenges his employer to a gunfight after he is cheated out of part of his wages. Jack attempts to teach the young man to shoot.

Two outlaw brothers, believed to be dead, come to Bordertown to rob the bank. Before they can carry out their plan, they are recognized by Hiram. When he speaks up, he is fatally struck by one of them. The brothers leave an accomplice behind so that they can escape, and when he tries to rejoin them, they shoot him. Knowing that the brothers will return, Clive and Jack set a trap to capture them.

Severely traumatized when her former ""master"" comes to Bordertown, Diane Denny tries to shoot him to avenge the beating death of her father, killed years earlier while attempting to escape.

A young woman, posing as a male ranchhand in an effort to find her husband's murderer, is shot on the streets of Bordertown.

Two escaped convicts come to Bordertown looking for the only man who can identify them. Claiming to be friends of Sally Duffield's imprisoned husband, they swindle her out of her jewelry by insisting that he can be paroled if she pays them a thousand dollars.

When Dom's friend dies, he leaves instructions that half his gold goes to Dom, but it is stolen before it can be recovered. Jack believes Clive's new lady friend is involved, but the mountie refuses to believe it.

A local trapper is found murdered and his furs stolen. The only clue left at the scene is a sliver of bone from the handle of a knife, and the only suspect is a French entrepeneur, a friend of Marie's, who is found holding the murder weapon after a dispute with an employee. Jack and Clive formulate a plan to flush out the real killer.

Willie's father comes to Bordertown with the intention of taking the boy back to France with him. Meanwhile, an escaped criminal is seeking revenge on Clive.

When a Mexican bounty hunter shows up in Bordertown, Jack is instantly suspicious, suspecting that the Mexican has actually come for him. When he and Marie are jailed by the bounty hunter, Jack confesses his secret past to Marie, revealing that his wife and daughter had been murdered by Don Carlos, a wealthy Mexican landowner who had been trying to drive Jack and his family from their land. In the ensuing fight, Jack had killed the Mexican's son. Seeking revenge, Don Carlos wants Jack delivered to him alive, but his bounty hunter has no problem with using Marie as a pawn to control him.

A band of teenaged outlaws ride into Bordertown intending to rob the bank. Marie reports to Clive when she sees the young outlaws go into the bank with their guns drawn. Clive is shot attempting to prevent the hold-up, and is dragged into the store by the robbers. Jack, in the marshal's office, and the outlaws in Marie's store exchange shots. Meanwhile, Clive, who knows one of the boys, tries to convince him that he is headed down the wrong path.

A visiting German is knocked unconscious while being chased by bank robbers who want the map he carries that will lead them to the money. He awakens with amnesia. Meanwhile, Clive's supervisor comes for inspection.

While giving Jack an eye exam during a physical, Marie discovers that he cannot read. Worried that many others in the area cannot read, either, she decides to order some primers. In spite of Marie's objections, Moberley proposes a boxing match between the marshal and the mountie to raise money for the books, but during the fight, his plans are to rob the town.

Clive's training officer arrives in Bordertown with his pregnant Indian wife, Nahanni. Driscoll had been shot in a skirmish with the U.S. Cavalry, who had apprehended Chief Sitting Bull from a reservation in Canada. Driscoll, determined to free Sitting Bull, had killed two of the soldiers, who follow him to Bordertown, seeking revenge.

A teenaged boy is hired by a group of horse thieves to deliver six horses stolen from a local ranch. When he realizes the horses have been stolen, Johnny intends to return the horses to their rightful owner, but when he is caught with them, the rancher decides to hang him as a horse thief.

While escorting a large amount of gold to Bordertown, Wendell is robbed and wounded, and the armed guard is killed by a couple of thieves. Then the killer turns the gun on his accomplice. Jack and Clive have trouble identifying the dead outlaw, but the killer turns out to be the estranged father of Bruno's girlfriend. Holding his family at gunpoint, he orders Bruno to bring him a horse and supplies.

Three members of outlaw gang Keenan's Raiders plan to meet in Bordertown to recover stolen gold they had buried years earlier. One dies of a heart attack on the stage, a second is found shot to death outside town. The third member has been wounded, and seeks medical attention from Marie. Jack and Clive discover that the two dead men are wearing identical belt buckles with a secret compartment, which conceals pieces of a map. Meanwhile, Marie has been taken hostage by the wounded man as he tries to dig up the buried gold.

Bat Masterson tracks a gang of outlaws into Canada, and refuses to adhere to Canadian jurisdiction. When Jack and Clive accompany him into Canada, Masterson leaves them, allowing them to ride into an outlaw ambush.

A Mountie wagon is ambushed, and the Mounties, including a friend of Clive's, are murdered by a gang of outlaw brothers. One of the brothers is captured and taken to Bordertown. When Clive decides to take him to Ft McLeod to stand trial, Jack and several of the townspeople act as decoys in an attempt to lead the rest of the gang away from the stagecoach on which Clive had elected to transport the prisoner. The outlaws do not fall for the decoy, and attack the stagecoach, wounding their own brother. Clive handcuffs himself to his prisoner as they are forced to flee on foot.

Stricken with guilt, Jack resigns after he accidentally kills a saloon girl during a dispute with a gang of ruffians. With the marshal's position vacant, the gang takes over Bordertown, and the Mountie is powerless to keep law and order on the American side of town. In attempt to regain order, he ""appoints"" Couteau temporary marshal.

The U.S. Cavalry is turning over a Gatling Gun to the Canadian Mounted Police, but when Clive arrives to escort the wagon into town, he is shot by one of the Mountie impersonators who has already killed the Mounties assigned to the transport. When they arrive in Bordertown to assume possession of the gun, Jack becomes suspicious of their behavior, and arrests one of them when he becomes aggressive with Marie. The next morning, the ""Mounties"" take the gun, and leave Bordertown. Meanwhile, Couteau has found the wounded Clive, and reports it to Jack, who must find a way to recover the stolen gun.

A retired Canadian colonel arrives in Bordertown with a stongbox containing money obtained by docking his men's pay. His intentions are to set up an estate for the men to work on when they muster out. Liam's niece, her husband, and cousin have joined the Fenian Brotherhood, and are after the money. Along with the strongbox, they kidnap the colonel, who had helped protect Canada from the Fenians years earlier.

When an American is killed over a land dispute, a Canadian is accused of the crime. Jurisdiction is questioned because the Canadian was standing on the Canadian side of the line, the American was standing on the American side.

A Blackfoot warrior rescues Marie when her horse bolts after being spooked by a snake. Jack recognizes her horse, and arrests the Indian for stealing it. Marie insists that he be released from jail, but he returns to bring gifts and to seek her attention. Infatuated with her, White Feather kidnaps her and takes her to the Blackfoot village with the intention of making her his wife. Clive must prevail in a test of manhood to win her back.

Two local ranchers become involved in a dispute over water rights between their properties. Meanwhile, a young physician comes to Bordertown and questions Marie's right to practice medicine. He takes his concerns to Clive, and threatens to press charges against her if she does not comply. Her ability is proven when Henry Jordan's son is shot over the water dispute.